Reviews of my favourite travel gadgets

More Power, More Speed: Is the ADO A20+ the better choice compared to HIMO Z20?

There’s one complaint I constantly hear about Himo Z20 e-bike: It is too slow. Even tough HIMO Z20 is a very reliable e-bike with a great design a bit more power would be beneficial to go faster than 25 kph. Despite there is an option to unlock the speed of other bikes, like Fiido D4s, no one has managed to do so with HIMO Z20 (this refers to a software unlock, you can change the controller and other parts to make it faster). So I got myself the ADO A20 which not only offers 350W motor power, it also has the option to unlock the speed to go up to 35 km/h.
ADO A20 was renamed after an adjustment to ADO A20+. ADO now uses their full brand name: A Dece Oasis.

Here’s my comparison review of the 20″ folding e-bikes: ADO A20 vs HIMO Z20 also including the specs of Fiido D4s and Fiido D11; In my post I want to:

  • Compare the main specs
  • Review the bikes and to point out differences as well as problems and issues
  • Give you shopping tips (coupon codes & customs info)


Video Comparison Review


Intro – Why 20″ folding e-bikes?

I got myself a compact-to-store e-bike for my daily commute to work and selected HIMO Z20. Important for me was the removable battery, so you can take it with you for charging. I think that 20″ wheels is the ideal compromise: the bike is small enough to store and the wheels big enough to provide a smooth ride. The larger wheels provide a comfortable driving experience for longer distances, compared to the 16″models of which many were released earlier. As mentioned the ADO A20 is very comparable by the specs but it also got a lot of interesting details that seem to be interesting improvements over Himo Z20.

Fiido offers a  more affordable 20″ folding e-bike – the Fiido D4s. Main difference is that the battery is built-in and therefore I excluded it from my personal selection. However I want to include it in this review with remarks, as it is a bit cheaper and if the removable battery is not an issue for you – maybe an interesting choice. I also own a Fiido D11, which is great for the city and paved streets, but it gets rough on gravel roads. So ADO A20+ and HIMO Z20 are better allrounder bikes.


ADO A20 vs Himo Z20 vs Fiido D11- Main Specs

NameADO A20+Himo Z20Himo Z20 MAXENGWE C20ADO Air 20ADO Air 20sFiido D11Fiido D21Fiido D4s
799 EUR
799 EUR819 EUR699 EUR
Coupon Code: 6NCLURKG
1349 EUR1499 EUR899 EUR1099 EUR 599 EUR
max. Speed:
25 km/h (15mph)
35 km/h (21mph)
25 km/h (15mph)
not available
25 km/h (15mph)
not available
25 km/h (15mph)
25 km/h (15mph)25 km/h (15mph)25 km/h (15mph)
28 km/h (17mph)
25 km/h (15mph)
25 km/h (15mph)
30 km/h (18mph)
(assisted mode)
80 km (50mi)**80 km (50mi)**80 km (50mi)**80 km (50mi)**100 km (62mi)**100 km (62mi)**80-100 km (62mi)**80-100 km (62mi)**80 km (50mi)**
Weight:21,2 kg (46,7 lbs)21,9 kg (48.2 lbs)22 kg (49 lbs)24 kg (52.9 lbs)16 kg (37 lbs)16 kg (37 lbs)17,5 kg (38.5 lbs)17,5 kg (38.5 lbs)18,5 kg (41 lbs)
155 x 53 x 110 cm147 × 61 × 109,5 cm147 × 55 × 109,5 cm160 × 61 × 110 cm156 × 57 × 110 cm156 × 57 × 110 cm148 × 57 × 110 cm148 × 57 × 110 cm150 × ? × 108 cm
90 x 43 x 70 cm86 × 45 × 74 cm86 × 40 × 74 cm76 × ? × 66 cm68 x 52 x 86 cm68 x 52 x 86 cm59 x 40 x 84 cm59 x 40 x 84 cm85 x ? x 64 cm
Folding Pedals:YesYesYes
Aluminum alloy
Aluminum alloy
Payload:120 kg (265 lbs)100 kg (220 lbs)100 kg (220 lbs)150 kg (330 lbs)120 kg (265 lbs)120 kg (265 lbs)120 kg (265 lbs)120 kg (265 lbs)120 kg (265 lbs)
Seat Pole:adjustable
in height
in height
in height
in height
in height
in height
in height
in height
in height
Steering Rod:adjustable
in height
NOT adjustable
in height
NOT adjustable
in height
in height
in height
in height
NOT adjustable
in height
NOT adjustable
in height
in height
10.4 Ah10.4 Ah10.4 Ah10.4 Ah
19.2 AH (Pro version)
9.6 Ah9.6 Ah11.6 Ah11.6 Ah10 Ah
Removeable Battery:YesYesYesYesYesYesYesYesNo
Battery Lock:YesYesYesYesNoNoNoNoNo
Motor Power:250W
(unlocked 350W)
350W int. version
350W int. version
Sensor:G Drive (improved speed sensor)Hall SensorHall SensorSensorTorque SensorTorque SensorSpeed SensorTorque SensorSpeed Sensor
Powers from standing still:YesNoNoYesYesYesYesYesYes
Cruise Control:Yes*NoNo???YesYesNo
Tires:20″ air tube
(20 x 1.95)
20″ air tube
(20 x 2.12)
20″ air tube
(20 x 2.12)
20″ air tube
(20 x 2.3)
20″ air tube
(20 x 1.75)
20″ air tube
(20 x 1.75)
20″ air tube
(20 x 1.75)
20″ air tube
(20 x 1.75)
20″ air tube
Yes / YesNo/NoNo/NoYes / NoNo/NoYes / NoNo/NoNo/NoNo/No
mechanical (disc)mechanical (disc)mechanical (disc)mechanical (disc)mechanical (disc)mechanical (disc)mechanical (disc)mechanical (disc)mechanical (disc)
Transmission:7-speed (Shimano)6-speed (Shimano)6-speed (Shimano)7-speed (Shimano)single speedsingle speed7-speed (Shimano)7-speed (Shimano)6-speed (Shimano)
Fenders:includedincludedincludednot includedincludedincludedincludedincludednot included
Features:USB Phone Charger
CE certified
Air pump in seat poleAir pump in seat pole
EU compliant
Carbon belt (instead of chain)Carbon belt (instead of chain)
Colors:black, whitegrey, whitegrey, whitegrey, blackblue, grey, ivorygreybluegreyblack, white
My Hands-on
Comparison Review:
A20 vs Z20Z20 vs A20
Z20 vs D11
Z20 vs A20
Z20 vs D11
coming sooncoming sooncoming soonD11 vs Z20
**estimated company data – based on my experience there is a lot of influence on the range: driver weight, flat or hilly road, constant drive or stop&go traffic, temperature,…
Range in full electric mode is about 60%.
Hard to get a fair test result to compare.
! There is the option to activate a cruise control in ADO A20, although I haven’t managed to make it work so far.


Review – ADO A20 vs Himo Z20

I picked these two bikes to compare as there are many similarities: 20″ folding e-bike with removeable battery. That is an important item for me so I excluded Fiido D4s. Great to use on roads and unpaved tracks while Fiido D11 is just good on well paved roads. So in the first section I want to point out the major differences between Himo Z20 and ADO A20, then take a look at similarities and minor differences (which still might be very relevant for your situation) and then take a look at the settings and driving modes:

What’s different?

Speed & Motor

Himo Z20 offers a 250W motor that provides a top speed of 25 km/h – on paper. Actually I achieve a top speed of 23-24km/h. I tried my best but haven’t found a solution how to unlock the speed. Don’t bother watching all the HIMO Z20 seed unlock videos on YouTube – they are misleading! In these videos they change the diameter of the wheel. This results in a higher speed displayed on the speedometer but the bike is not going faster. I tried with a second speedometer.
There is of course the option to make it faster by changing controller and motor, but you need to change the hardware.

ADO A20 also offers a 250W motor and a top speed of 25 km/h. That is important as these are legal requirements in many countries. Although it can be unlocked within the settings on the controller. Then ADO A20 offers 350W and a top speed of 35 km/h. That is even faster than Fiido D4s that can be unlocked to go 30 km/h, Fiido D11 can be unlocked to 28 km/h.


Design & Frame

Xiaomi HIMO Z20 review - Frame & Design - BMX design, Cables run inside the frame, ports are covered

HIMO Z20 – Frame & Design – BMX design, Cables run inside the frame, ports are covered

I think that HIMO Z20 has a bit more appealing design. It looks like a regular BMX bike and less like a chunky e-bike. I also like the fact that the cables run inside the frame and are not visible. Welding is quite ok and all ports are nicely covered.

ADO A20 - 350W 35 km/h 20" folding e-bike - - Frame & Design - Very useful handle grip

ADO A20 – Frame & Design – Very useful handle grip

On the other hand ADO A20 has a more practical design with a lot of design details that are very convenient. I really like the handle-grip included in the frame near the center of gravity of the bike. Great when you need to move it around in your flat, office or public transport. Welding is very similar to Himo Z20, I don’t like that ports are not covered. But there are smaller more design details I appreciate:

ADO A20 vs Xiaomi HIMO Z20 e-bike review - Stand when folded and unfolded

ADO A20 vs HIMO Z20 – Stand when folded and unfolded

When folded the weight of ADO A20 rests on a metal frame and is very stabile. While HIMO Z20 rests on the cover of the front sprocket and the seat pole and easily tips over to the side. The stand of ADO 20 is placed further to the rear so it is not touching the pedals, on my HIMO Z20 they easily touch and scratch both pedal and stand.



Important notice: The weight of ADO A20 is often stated wrongly! I tested on a scale and can confirm, the weight of ADO A20 is 21.0 kg (46.3 lbs) including battery and with fenders mounted. The weight of Himo Z20 is 21,85 kg (48.2 lbs) including battery and with the plastic fenders mounted. (Z20 comes with plastic and aluminum fenders, you can shoode which one you want to mount). So even tough ADO A20 has a suspension, which usually increases weight, it is lighter than Himo Z20. I assue that’s because the frame is heavier on Z20.

ADO A20 vs HIMO Z20 - Weight Comparison (incl. battery & fenders)

ADO A20 vs HIMO Z20 – Weight (incl. battery & fenders)



ADO A20 vs Himo Z20 - Display, Drive Mode, Settings, Manual

ADO A20 vs Himo Z20 – Display

  • ADO A20: The display holds three buttons to power on the bike and to select the different driving modes. These buttons are also used to change settings. (More on that in the driving mode section). Next to the display are two further buttons for the front LED light and the electric horn. Current speed, driving mode, trip/total mileage and battery status are displayed.
  • Himo Z20: You can find 4 buttons on the display: the power button and the switch trip/total mileage on the bottom and +/- buttons to select the driving mode. Long pressing the plus button turns on the front LED light. There is no electric horn, but a regular bell on Z20. Similar to ADO A20 current speed, mode, trip or total mileage and battery status are displayed.

The display of ADO A20 is brighter & larger and therefore way better to read, especially in direct sunlight.


Phone Charger

ADO A20 20" folding e-bike review - USB port for phone charger

ADO A20 – USB port for phone charger

A super convenient feature of ADO A20 is the USB port on the handle bar. A phone holder is also included in the standard package so you can not only mount your phone, you can also charge it while riding. Great feature when you want to use maps for example.


Suspension & shock absorbers

ADO A20 - 20" folding e-bike review - Suspension & Shock Absorber

ADO A20 – 20″ folding e-bike review – Suspension & Shock Absorber

HIMO Z20 doesn’t offer any form of suspension or shock absorbers. On the other side ADO A20 offers a suspension on the front wheel with a shock absorbing fork and below the saddle there is a damper as well.



ADO A20 vs HIMO Z20 - Battery

ADO A20 vs HIMO Z20 – Battery

The battery of both e-bikes have a capacity of about 10 Ah and are stored inside the frame of the bike. Both batteries can be locked, the lock is located on the battery. The lock of HIMO Z20 is on the front when opening the frame, the lock of ADO A20 is accessed from the bottom. This has a special reason as you need the key to turn it on. There are 3 lock positions: released, lock & turn off as well as lock and turn on. Guess it’s a matter of taste: On the one hand it is more secure that you need the key to activate ADO A20, on the other side you always have to have the key with you.
Both batteries can be removed for charging – that’s convenient if you lock your bike and just take the battery with you for charging. Or you can charge it when the battery is placed inside in the bike.


ADO A20 vs HIMO Z20 - test, unboxing, review - Charger (EU Plug version)

ADO A20 vs HIMO Z20 – Charger (EU Plug version)

The charger is of course included, be aware that the charger for Himo Z20 is very bulky in case you need to take it with you. Don’t worry about the correct power plug, it connects to the charger using a 3-pole cable so you can exchange it inexpensively. The charger of ADO A20 is more compact to take it with you and is using a 2-pol cable.


Similarities and minor differences:

Tires, Wheels & Brakes

ADO A20 vs HIMO Z20 - Comparison Review - Brakes

ADO A20 vs HIMO Z20 – Brakes

A very visible difference are the wheels. While HIMO Z20 is using a classic spoke design, found on most bicycles, ADO A20 wheels featur ae six-axis spoke design which to me is very appealing.
ADO A20 and HIMO Z20 use 160mm diameter mechanical disc brakes on front and rear wheel. The brakes were quite well adjusted out of the box, but I do recommend fine tuning them before your first ride. You do so with an Allen key, like on any other bike. With ADO A20 the tool was already included.
Both bikes offer 20″ air tube tires, to be precise ADO A20 tires measures 20 x 1.95 compared to HIMO Z20 20 x 2.125. The profile and the width of the tires are perfect to go on unpaved roads.



ADO A20 vs Xiaomi HIMO Z20 - comparison review - LED Lights

ADO A20 vs HIMO Z20 – LED Lights

The LED headlights on both bikes are connected to the bikes battery and can be turned on and off via a button next to the display. While the headlight of Himo Z20 consists of one LED the headlight of ADO A20 is super bright using four LEDs.
Unfortunately there is no rear light included with ADO A20, just a reflector is mounted on the seat pole. HIMO Z20 offers a combination of rear light and reflector which is not connected to the bikes battery and therefore battery powered. One reason why it might not be connected is the removable seat pole of Himo Z20 that can be used as an air pump. With ADO A20 a small air pump as accessory is included in the standard package.

I replaced both rear lights and can recommend using Xlite 100. It has automatic movement detection, so it turns off when you don’t move. Further it detects change in movement, so when you brake it flashes brighter. And with a light sensor it automatically turns on/off according to the daylight. It is charged via USB port.



ADO A20 vs HIMO Z20 - Comparison review - Throttle Control

ADO A20 vs HIMO Z20 – Throttle Control

Both bikes are controlled by a throttle integrated into the handle grip that needs to be twisted, similar to a motorcycle. Yet there is a slight difference, while you need to twist the full handle grip on HIMO Z20, only a section of the handle on ADO A20 needs to be twisted. I find this way more convenient as it gives you more relaxed hand position during the ride. (also compare picture below)
Himo Z20 does not accelerate from standing still, the bike has to be in motion. But only a slight push by your foot is needed and you can accelerate fully electric. ADO A20 can accelerate from standing still, but you can configure that in the settings as you prefer.
Even more convenient: ADO A20 is offering cruise control so you do not have to hold the throttle constantly. HIMO Z20 does not have this option.


Gears & Gear Shift

ADO A20 vs HIMO Z20 - Shimano 7-speed Gear Shift

ADO A20 vs HIMO Z20 – Gear Shift

Both bikes offer a Shimano gear shift and the shifters look almost identical with a lever to change to a higher gear and a button to change to a lower gear. There is a difference as Himo Z20 offers a 6-speed gearshift while ADO A20 offers a 7-speed gearshift with a respective number of sprockets on the rear wheel. The sprocket on the front is covered on the inside and on the outside on both bikes. That’s important so your trousers don’t get ripped on your way to the office. Gearshift on both bikes was well adjusted out-of-the-box I didn’t have to finetune them.



ADO A20 vs HIMO Z20 - comparison review - flip-up Pedals

ADO A20 vs HIMO Z20 – flip-up Pedals

The pedals of both ADO A20 and Himo Z20 are made of plastic but provide a good grip. They can be folded for an even more compact storage size. As these are standard bike parts they can be easily replaced if you want fixed metal pedals and don’t need the option for storage. A reflector is integrated (which is legally required in some countries).


Size & Weight

ADO A20 vs Xiaomi Himo Z20 - Dimension (folded)

ADO A20 vs Himo Z20 – Dimension (folded)

When unfolded they are about the same size and about 110 cm long. HIMO Z20 is 147cm tall and that refers to the steering rod which is not adjustable in height. With ADO A20 you can adjust the height and this is of course a great option to find a comfortable driving position.

As you can see when folded they also have a similar size, but when it comes to storage every cm / inch counts, therefore in detail:
ADO A20 is 90 cm long, 43cm wide and 70 cm tall. HIMO Z20 is 86 cm long, 45 cm wide and 74cm high.

There is one design part I want to highlight: When HIMO Z20 is folded it sits on the cover of the front sprocket and the seat pole. Something I dislike a lot since I’m afraid these parts can be damaged when the bike is stored. ADO A20 features this metal frame where the weight of the bike rests. This also secures the bike from falling over to the side! Little detail, but very important!

I believe the stated weight of ADO A20 is wrong. In the specs it says 28 kg but it feels lighter than the 21.4 kg Himo Z20. I need to get a proper scale to check again.


ADO A20 vs Himo Z20 – driving modes

Manual Mode

First of all you can go fully manual (you don’t even have to power them on) and they work just like regular bikes. However due to the battery they are a bit heavier than regular bikes and therefore require a bit more effort when pedaling. Don’t worry it’s not that much of an exercise but I won’t recommend them if you want to pedal without assistance most of them time. You can remove the battery on both of them to make it lighter if you go fully manual.

The driving modes on ADO A20 and Himo Z20 are similar but very different to Fiido e-bikes. With Fiido you basically set the level of assistance. To me that’s a bit misleading. I have the feeling that with Fiido the motor is not assisting your pedaling, the motor is rather activated to full throttle when you start pedaling.

ADO A20 – Driving Modes

There are 3 different driving modes on ADO A20. And the great thing about it, which I haven’t seen on similar e-bikes, you can adjust them within the settings.

  • Mode 1 – is the pedal assist mode. When you start pedaling the motor kicks in and supports your ride. As mentioned with the controller you can adjust wen the motor should start its support. The pedal assist mode works to a speed up to 18 km/h. In this mode the throttle is disabled, but you can also adjust that within the settings (more on that at the end of the article)
  • Mode 2 – is the first full electric mode. When turning the throttle the bike accelerates up to 25 km/h. You can adjust within the settings if zero start is enabled or not. Zero starts means being able to power the bike when standing still.
  • Mode 3 – in this mode you can unlock the speed of ADO A20 up to a top speed of 35 km/h. More on that at the bottom of the article.

There is a new controller offered for ADO A20, which allows you to go faster in pedal assist mode. The new controller allows you 2 new options for the 3 modes, you can either select:
– 3 full electric modes (15 / 20 / 25 kph)
– or 2 pedal assist modes (18 / 25 kph) and a full electric mode with 35 kph.

You can order the controller in a set with rear light and reflector for the wheels (which is not included with the bike) in their Aliexpress Store. Be sure to get the right one as there are new controllers also for ADO A16 and ADO A20F. Check out their website: www.adoebike.com
They also released a YouTube video how to change the controller which should be easy to do.


Himo Z20 – Driving Modes

  • ECO – is the pedal assist mode. When you start pedaling at about 5 km/h you feel the motor kicking in and it makes pedaling seemingly easier. It feels like the motor is assisting your pedaling in relation to the speed you want to go by pedaling. The assistance mode works up to 18 km/h but you can always go faster by pedaling. However at this speed the effort to go even faster is lower than from standing still. In this mode the throttle is not activated.
  • MID – is a full electric mode. When you twist the throttle the bike accelerates up to about 18 km/h. You can always go faster by pedaling the bike is not slowing you down.
  • HIGH – is the second full electric mode and the bike accelerates up to 24 km/h. (As mentioned I didn’t get 25 km/h I think the limit is 15 mph). Again you can always go faster by pedaling, the bike is not slowing you down or braking.

Usually I go in High Mode and pedal as well to go faster. I only switch to Eco mode when I want to have the feeling of riding a bicycle with the benefit of being less exhausting, so I don’t arrive sweaty in the office.


Issues and Problems

  • HIMO Z20 Problems: The bike is not hitting 25 km/h and maximum speed is 23-24 km/h. I think that is the case because to speed is set to 15 mph. It’s just 1-2 km/h but still bothersome. The plastic pedals on Himo Z20 slightly yield and don’t provide the best grip. If you go full electric most of the time you don’t need to worry. Since I often like to pedal to go faster I replaced them with different folding pedals. If you don’t need folding ones for storage reasons you can also go for aluminum pedals.


  • ADO A20 Problems: Similar to Himo Z20 the pedals are not the best and I replaced them. There is a bit of a rattle noise from the battery as it is not fully tight within the battery compartment, but that is an easy fix you just need to apply some adhesive tape or felt pads on the battery and this issue is solved.


ADO A20 – Replacement Parts

Need replacement parts for ADO A20 e-bike? No problem, great to see ADO lists all parts on their ADO bike store on Aliexpress or on their website: adoebike.com


ADO A20 vs Himo Z20 – Short summary

I have to say I was for more impressed when I unpacked ADO A20 than I expected. There are so many details I instantly loved and instantly missed on the HIMO Z20:

Higher top speed, more power
Suspension on front and back
very bright and large display
Phone Charger
super bright headlight
Frame (handle grip & stand)

folding size (similar to HIMO Z20)
missing rear light (would have replaced it anyway)

key needs to be inserted while driving


More Infos?

Here’s my hands on comparison of Himo Z20 and Fiido D11 and below a video comparison of Himo Z20 and its predecessor Himo C20. Of course a ADO A20 vs HIMO Z20 video will follow soon – stay tuned!


Want to talk to other users? Join the Facebook groups:


Buyer Guide – Retailer & Price – Comparison

Info for EU buyers:
– Tax:
Since July 1st all online platforms have to collect the local VAT of your country. So prices slightly vary according to the local tax rate.
– Customs: If the bike is shipped from an EU country to another EU country there is no customs to be paid.



  • official ADO Website: www.adoebike.com – 799 EUR
    • official website of ADO
    • 48h free shipping options across EU & UK
    • no additional taxes or customs
    • buy directly from the manufacturer
  • Geekbuying:
    • EU Warehouse: 829 EURvisit store 
      • check website for coupon codes!
      • 7 day free shipping within EU
      • tax included & no customs within EU
    • UK Warehouse: 729 GPBvisit store 
      • 7 day free shipping within UK
      • tax included & no customs within UK
  • Aliexpress – ADO bike store official:
    • EU Warehouse: 759 EURvisit store
      • Coupon added on website
      • 7 day free shipping within EU
      • no customs within EU
  • Amazon DE & UK:
    • ADO (A Dece Oasis) also launched their official stores on Amazon DE & UK:
      • Click the coupon below the price to activate the discount!
Amazon DE

Amazon UK


Himo Z20

  • official HIMO Website: www.himobikes.com – 799 EUR / 686 GPB
    • official website of Himo
    • free shipping within EU, UK, US & Indonesia
    • no additional taxes or customs
    • buy directly from the manufacturer
  • Aliexpress:
    • EU Warehouse: 831 EURvisit store
      • check for coupons on website
      • incl. tax & customs
      • free shipping within Europe
  • Geekbuying:
    • EU Warehouse: 899 EUR – visit store 
      • check for coupons on website!
      • free shipping within Europe
      • no taxes & customs within Europe
    • UK Warehouse: 773 GPB – visit store 
      • free shipping within UK
      • no taxes & customs within UK
  • Amazon DE & UK:
    • Himo Bikes are also available on Amazon DE & UK
Amazon DE

Amazon UK



ADO A20 – How to unlock speed and other controller settings

To enter the settings mode you need to turn on your bike and press the + and – button for 3 seconds. Then you see the different options (indicated with P) and can cange the settings as follows:

  • P01: Display Brightness – 1 is darkest, 3 is brightest setting
  • P02: Metric system –  0 is KM, 1 is Mile
  • P03: Voltage – there are options for 24V, 36V & 48V. That’s because the controller is used on several bikes.
  • P04: Bike Auto Shutting-down time – it means if you do not operate the bike computer or use
    the e-bike within the minutes range from 1 to 60 minutes, the bike computer will shut down
  • P05: PAS (pedal assist) preference – 0 only shows 1-3 levels; 1 shows 1-5 levels. ( Just showing
    PAS level number are different, but top and lowest level power is the same, such as 3 = 5 in
    different working modes).
  • P06: Wheel/rim diameter in inch – Options are 20/22/26/28 (if 20 inch rim, setting number
    will be 22inch)
  • P07: Speed Monitor setting, this technical setting is no use for customer but only for engineer
    setting, please do not modify or change the setting. Range: 1-100;
  • P08: Speed limited setting – You can set between 1 and 100 km/h. If set to 100 it means there is no limited for speed. The speed limited setting is controlled by motor and controller. You can only set the bike computer speed limit with the range of limit motor and controller. If you set it to 50 the top speed will be 35 km/h since that is the max speed for this bike with this controller and motor.
  • P09: Zero boost or Non Zero boost – 0 means zero boost, you can apply power from standing still. 1 means non zero boost, you have to be in motion to apply power from the motor.
  • P10: Driving modes – 0 – PAS only, the throttle is not working. 1—throttle only, PAS is
    not working. 2—both throttle and PAS are working.
  • P11: PAS sensitivity setting – Range: 1-24
  • P12: PAS strength setting – Range: 1-5
  • P13: PAS magnetic sensor setting – Range: 5/ 8/12
  • P14: Controller Max current limit setting – Range: 1-20A
  • P15: Controller Low voltage setting. Range: N/A, need to check with controller technical data
  • P16: ODO – total odometer clearance setting. Press for 5 seconds in setting mode,
    you can change and clear the current total odometer to Zero.
  • P17: Cruise control setting – 0— cruise control inactive, 1 — active cruise control
  • P18: Speed adjustment setting – Range: 50%-150%, this technical setting is no use for customer
    but only for engineer setting, please do not modify or change the setting.
  • P19: PAS 0 setting – Range: 0—active PAS 0; 1—inactive PAS 0.
  • P20: Data transfer mode setting – Range: 0—NO.2 data transfer mode; 1—5 S data transfer
    mode; 2—backup data transfer mode; 3— backup data transfer mode.


HIMO Z20 – Controller Settings

Press M button for about 8 seconds to enter the menu. When entering the menu there are the following options:

  • Cr: cleanup [y] to set the trip kilometers to zero
  • S7: Select Mph or Kph
  • b1: Brightness of the display backlight (only active when headlight is turned on)
  • OFF: Auto power off – the number represent minutes to shutdown
  • Hd: Wheel diameter (That’s what most YouTubers did, when you enter a larger diameter the displayed speed is higher, but not the actual speed)
  • b0: Battery voltage – 36V is for Himo Z20.
  • Pd: Password – enter password 1919, then you see:
    • SL: Speed limit – default is 25km/h – you can change the speed limit on the screen, but it will not work


ADO A20 vs HIMO Z20 – Specs

* can be unlocked
** to be confirmed

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  1. Rui 24. May 2021 at 13:26 Reply

    How can I unlock the speed limiter on the ADO A20

    • el Producente 4. June 2021 at 14:22 Reply

      I added the info to my article. You have to press the + and – button on the controller, go to menu P08 and change from 25 to 100.

  2. Ferenc 28. May 2021 at 23:16 Reply


    This was a great read, thank you.
    I am hesitating between ADO A20 and Fiido D11.

    In your opinion, which one is the better (buy)?

    • el Producente 4. June 2021 at 14:19 Reply

      Since I had some minor issues with D11 and the fact that you can unlock the speed and motor power on A20, I would tend to A20.
      Fiido D11 has a nicer design and is lighter if that is important to you.

  3. Thibaut VAN DEN BERGHE 12. June 2021 at 18:59 Reply

    Hello, on the ADO A20, is it possible to increase the power only to 350W while keeping the maximum speed at 25km / h ? Thx!

    • el Producente 23. June 2021 at 11:51 Reply

      Good question, I have to check. Only know how to increase speed at the moment and suspect that power is adjusted accordingly

  4. Markel 31. August 2021 at 17:37 Reply

    Hi, very helpful review. Ado A20 seems to be the right choice but I can’t find a review where any e-bike is tested against a hill climb.

    I need a bike that performs well going uphill to my work (about 10% slope), are any of the bikes you’ve tested able to do it?

  5. Mihnea 31. March 2022 at 12:44 Reply


    Thanks for the reviews man! This is very helpful. Although I consider to purchase one of the models you reviewed, I would incline towards the one that has a replaceable battery.

    In your review it would be amazing if you can talk about replacing the battery. It’s very hard to get the exact specs (sizing for instance) for these batteries. Fiido I know offers replacement batteries on their website. But what can you tell us about ADO?

    Thank you again and I would really appreciate any info on this matter.

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