Build Your Own Rear 250/500w E-Bike Conversion Kit Builder

Standard Spec Price
£249.00
Earn
£24.90
in Customer Rewards when you buy this item today
Short Description

Rear 250/500w 36v E-Bike Conversion Kit by Cyclotricity. Switchable between 250w and 500w.

Customise & Buy
Customise your product & Buy online today
Battery
Why Chooose None?
None

None

No Battery.

Why Chooose *OUT OF STOCK* 9Ah Frame Battery?
*OUT OF STOCK* 9Ah Frame Battery

*OUT OF STOCK* 9Ah Frame Battery

36v 9Ah frame mounted battery. Attaches to bicycle frame using the bottle cage screws

+ £235
Why Chooose *OUT OF STOCK* 11Ah Pannier Rack Battery?
*OUT OF STOCK* 11Ah Pannier Rack Battery

*OUT OF STOCK* 11Ah Pannier Rack Battery

36v 11Ah Pannier Rack Battery. Comes supplied with it's own pannier rack.

+ £235
Why Chooose 14Ah Frame Battery?
14Ah Frame Battery

14Ah Frame Battery

14Ah Frame Mounted Battery. Mounts onto the bottle cage bolts on your downtube.

+ £335
Why Chooose *OUT OF STOCK* 17Ah Pannier Rack Battery?
*OUT OF STOCK* 17Ah Pannier Rack Battery

*OUT OF STOCK* 17Ah Pannier Rack Battery

36v 14Ah Pannier Rack Battery. Comes supplied with it's own pannier rack.

+ £415
Why Chooose 19Ah Frame Battery?
19Ah Frame Battery

19Ah Frame Battery

36v 19Ah Frame Mounted Battery. Uses bottle cage mounting bolts to attach to the frame.

+ £440
Brakes
Cable Brake Levers (with cut off switch)

Cable Brake Levers (with cut off switch)



Why Chooose Tektro Hydraulic Brakes (with cut off switch)?
Tektro Hydraulic Brakes (with cut off switch)

Tektro Hydraulic Brakes (with cut off switch)

Brake Levers, Hose, Calipers and 180mm disc. Brakes are attached to European Spec so depending which side you prefer brakes to be on you may need to swap the brake hoses around.

+ £99
Display
None

None



Why Chooose LED Display?
LED Display

LED Display

Basic LED Display. 3 levels of PAS control, power button, walk assist and battery level indicator.

+ £39.99
Why Chooose LCD Display?
LCD Display

LCD Display

This is needed if you wish to de-restrict this kit. The LCD Display gives greater functionality with a digital speedo, odometer, timer, trip meter, 5 levels of PAS control and a few other features. Instructions on how to de-restrict can be sent after signing a disclaimer.

+ £79.99
Freewheel
None

None



6 Speed Freewheel

6 Speed Freewheel



+ £13.99
7 Speed Freewheel

7 Speed Freewheel



+ £14.99
8 Speed Freewheel

8 Speed Freewheel



+ £23.99
9 Speed Freewheel

9 Speed Freewheel



+ £29.99
10 Speed Freewheel

10 Speed Freewheel



+ £109.99
Pedal Assist
No Pedal Assist

No Pedal Assist



Add Peddle Assist Sensor

Add Peddle Assist Sensor



+ £20
Torque Arm
None

None



Why Chooose Add Torque Arm?
Add Torque Arm

Add Torque Arm

This is used to increase the strength of your drop outs. Advisable if you have a higher power kit.

+ £20
Wheel Size
Why Chooose 26
26"

26"

26" Wheel

Why Chooose 27.5
27.5" (650b)

27.5" (650b)

27.5" / 650b Wheel

Why Chooose 28
28"-700c

28"-700c

28"/700c Wheel

Why Chooose 29er?
29er

29er

29er Wheel

Your Build Your Own Rear 250/500w E-Bike Conversion Kit Builder
  • Battery :
  • Brakes :
  • Display :
  • Freewheel :
  • Pedal Assist :
  • Torque Arm :
  • Wheel Size :
  • £249.00

    Before Purchasing

    Note that, unlike standard items elsewhere in the Online Store, we cannot guarantee that all components and parts selected during the customisation process will be readily available in our store or warehouse. To that end, we will contact you (using the details you provide during Checkout) to discuss a Lead Time on Delivery.

    If this is a time-sensitive purchase (such as a Gift), then you may want to consider contacting the team before placing your order online to ensure that your Build Your Own Rear 250/500w E-Bike Conversion Kit Builder can be built and delivered in to your deadline.

    Earn Rewards
    When you buy the Build Your Own Rear 250/500w E-Bike Conversion Kit Builder, you will earn of rewards points to spend on your next purchase from us, anything online and instore.

    Easy Returns

    If you are not completely satisfied with your purchase you can return it up to 365 days after date of purchase. *Terms & Exemptions Apply.

    If you wish to return your product for any reason please contact us by phone or email. We will happily arrange the courier collection for you. 

    We will accept returns up to 365 days from receipt so long as the item is in the original packaging and in original, as new/unused, saleable condition.* 

    For unwanted products to be retrned to us you will need to pay for the courier. £35 for bikes, £14.99 for conversion kits and £4.99 for other products. 

    If your product needs to be returned for a warranty issue we will handle all shippings costs.

    *We will accept returns on all products for up to 365 days except motorbikes and mopeds for which the return period is 14 days. For these items it will be the customers responsibility to return them to the store in as new/unused, salable condition.

     

    Please fill out and return the Returns Form with your item.


    Please note that for hygiene reasons we cannot accept returns for undergarments if they have been worn. We understand that you would like to try on clothes for fit but when doing so please wear some form of clothing underneath. Otherwise it can be a very grim process for our returns staff to inspect and no refund can be given.
    Once your product has been received at Powerbikes it will be inspected before a refund can be given. A refund can only be given once goods have been inspected so there may be a small delay in the refund being paid.

     

    Motorbikes and mopeds can only be returned within 14 days of original order.

    Build Your Own Rear 250/500w E-Bike Conversion Kit Builder

    Rear 250/500w 36v E-Bike Conversion Kit by Cyclotricity. Switchable between 250w and 500w.

    Electric bike kit specifications:

    • Motor: 500W gearless brushless rear hub motor, comes integrated in a wheel size of your choice.

    • Restricted to 250W and 25km/h by default as a road-legal kit

    • 500W mode reaches maximum speed of 32km/h (20mph) once de-restricted (requires a 36V battery)

    • Wheel size: 26inch, 700c, 28inch or 29er

    • Wheel material: Double walled alloy rim with reinforced spokes to withstand extra pressure.

    • Throttle: thumb type – gradual lever, the further it is pressed, the more power is provided.

    • Brake levers: Electric levers that also cut the power when applied.*

    • Controller: 22A current

    • Cables: Motor cable and system cable (designed for simplicity and minimal wiring)

    • Bag: for mounting the controller

    • Brake compatibility: Compatible with both disc brakes and V-brakes

    • Fork compatibility: 135mm between fork drop-outs (which is the vast majority of rear forks that are suitable for a derailleur)

    *Note: *Note: Cable brake levers come with the kit as standard. There is now an option for Tektro Hydraulic Brakes with cut of switches for an additional £99
     

    Pedal Assist System

    A Pedal Assistance System is a device that senses your pedaling and makes your kit give automatic assistance, i.e. you do not have to press the throttle throughout your journey.

    • Pedal Assistance System with LCD Dashboard
      This package combines a Pedal Assistance System with an advanced LCD handlebar monitor which, not only gives you five levels of power, but also displays your speed, journey distance, time, average speed and many other readings.
      The LCD computer is required to unlock the full power of 500W for off-road use.

    IMPORTANT: For Pedal Assistance System to fit, the bottom bracket on your bike needs to be a Square Taper type (which is the most common bottom bracket on ordinary bikes). If you don’t have a square taper bottom bracket, you may need to replace it as well as the crank arms to make your bike compatible with the PAS. If in doubt, please consult a bike service shop on how to fit a square taper bottom bracket on your bike.

     

    Before you buy this kit

    Which kit is right for me?

    The most cost effective strategy in a kit purchase is working out in advance what you’ll generally use it for. That way, you can pick a variation suitable for your needs without adding unnecessary costs. Front and rear drive kits both have their own unique characteristics. We have divided our kits into three categories that generally cover the needs of most people. To help you narrow down what’s right for you, here is a summary of the major differences for this kit compared to its other two counterparts:

    500W Rear Drive
    We’ve introduced this category as it uses the same 36V batteries as the front drive motors. Which makes this kit strike the perfect balance between cost and power. Prices are not much higher than the 250W front drive but with the benefit that once you add the LCD computer, you can de-restrict it and get a glimpse of some of the power that you can experience with the high power off-road kits. In other words, it is the best of both worlds at great value.
    This kit is recommended for you who are on a budget, does most of cycling on-road, but want the occasional off-road fun added.
    Please note that the kit will be supplied restricted to 250W by default and will require the LCD to de-restrict it to the full 500W for off-road use.

    Things to think about before purchasing this rear drive conversion kit:

    – The rear drive motors are only compatible with a 3speed, 5speed, 6speed, 7speed, 8speed, 9speed or 10speed freewheels (not compatible with a cassette type sprocket, i.e. if your bike is fitted with a cassette, you can purchase a freewheel together with your kit for it to fit). If you have a single speed bike, you can install a 3speed freewheel for compatibility (and use only one of the 3 speeds).

    – The rear forks on your bike need to have 135mm clearance between the drop-outs (which is the case with the vast majority of bikes)

    – The LCD computer is necessary to unlock the full power of these high power motors. 

    – The electric brake levers supplied with the kits are mechanical. I.e. they are not compatible with hydraulic brakes or brakes that are combined with gear levers. However, installing the brake levers are not a necessity and the kit will work fine without them. Moreover, the throttle is spring-loaded, i.e. it will cut the power whenever the thumb is released from it for safety.

    LED Display

    Cyclotricity 250w E bike Front Wheel Conversion Optional LED Display - www.powerbikes.uk

    A basic display giving 3 levels of power for pedal assist. Battery Level indicator and speed display in Kilometers per hour.

    LCD Display

    Cyclotricity E bike Conversion LCD Display - www.powerbikes.uk

    This display has a lot more functions built in. Digital readouts for speed (Km/h or Mp/h), odometer, timer, trip and

    battery level. It also has 5 levels of for pedal assist.

    Brakes

    The kit comes as standard with cable brake levers. The levers have a cut off switch built in which cuts the motor. It is not 100% necessary to fit these as the kit will work fine without them, the motor stops when you stop pedaling or let go of the throttle. However they are a handy safety feature. 

    There is now an option for Hydraulic Brakes. We can supply Tektro E-Bike Hydraulic Brakes with cut off switches for £99 when bought with this kit. Tektro E-Bike Brakes come as: Brake Levers, Hose, Calipers and 180mm disc. Brakes are attached to European Spec so depending which side you prefer brakes to be on you may need to swap the brake hoses around. 

     

    Batteries

    Bottle Battery

    Our most lightweight and stylish battery, and the flagship identifier for our own popular Stealth and Revolver electric bicycles. Neatly disguised as a bottle, it weighs just under 2.5kg yet packs 36V 9Ah worth of cells giving a range of up to 30miles*. The bottle battery is great for you who are looking for value for money and keeping weight at a minimum.

    36V/9Ah
    – Suitable for our 250W and 500W motor systems
    – Up to 20-30miles on one charge when used with this particular motor*
    – Range could drop own to 12miles once motor is de-restricted to full power.
    USB Port: None

     

    Pannier Rack Battery

    With its high capacity cells, the Pannier Rack Battery is all about reliability and range. Provided with its own free rack, it makes for great practical use and can be turned completely inconspicuous when covered with pannier bags.
    If you intend on converting a step-through bike, this is almost certainly the most suitable option for your conversion. Available in two versions:

    36V/11Ah
    – Suitable for our 250W and 500W motor systems
    – Up to 30-45miles on one charge when used with this particular motor*
    – Range could drop down to 15miles once motor is de-restricted to full power.
    -USB Port: None

    Frame Battery

    With its sleek design, the frame battery is made to pack an enormous amount of power in a small package. It’s mounting position on the bike down-tube creates a low centre of gravity for light manoeuvrability and an enhanced feeling of an overall lighter electric bike. Available in two versions:

    36V/14Ah

    – Suitable for our 250W and 500W motor systems
    – Up to 35-45miles on one charge when used with this particular motor*
    – Range could drop down to 20miles once motor is de-restricted to full power.
    -USB Port: Active

    36V/19Ah

    – Suitable for our 250W and 500W motor systems
    – Up to 55-65miles on one charge when used with this particular motor*
    – Range could drop down to 35miles once motor is de-restricted to full power
    -USB Port: Inactive

    *Range mentioned are based on optimum cycling conditions and can vary depending on various factors such as mode, pedal assist settings, number of stops/starts, tyre pressure, terrain and the weight of the cyclist. Based on restricted 250W mode only.

     

    Torque Arm

    This is an optional extra however it’s highly recommended on higher power conversions.

    Torque arms are there to help your bicycle’s dropouts (the part of the bike that holds onto the axles of the wheels) resist the torque of an electric hubmotor. Normal bicycle wheels don’t apply much torque to the bicycle dropouts. When you add a high power motor there can be much more torque applied than the the dropouts were originally designed to take.

    Technical Information

    We do not supply paper instructions as it is extremely wasteful. Many people do not look at them and just put them into general waste instead of recycling. As part of out continued approach to promoting sustainability all the instruction manuals for conversion kits are available to download here.

    If you have any questions or difficulty installing the kits please don't hesitate to get in contact and we will be happy to help.

     

    If you would like us to send the de-restrict instructions for the rear conversion kits please download the de-restrict terms and email a signed copy to info@powerbikes.uk

     

    De-restriction And Throttle Terms of Use

    Pannier Rack Installation Guide

    Cyclotricity Kit Installation Guide 2nd edition

    eKit LCD Dashboard User Manual 3rd edition

    eKit LED Dashboard User Manual 3rd edition

    Sizing Information
    Professional Opinion

     

    Are you torn between choosing a powerful kit and a road-legal kit?
    Well, have both in one!

    The UK/EU regulations dictate that a kit must not exceed the rated power of 250W to be road-legal. Which is not great news for the thrill-seekers and power hungry among us who want to have the occasional fun off-road yet still be able to ride sensibly and legally on-road. A purchase of the common high-powered kit will come with its legal implications. On the other hand, the practicality of a road-legal kit means giving up the fun one could have off-road. So which kit do you choose?

    With these new rear wheel kits, CycloTricity had set out to resolve this very dilemma for its customers. We have developed a unique system that allows the user to swap between two modes depending on whether you are on-road or off-road, allowing you to unlock the full power where it is safe and legal to do so.
    This dual-mode system is embedded in the LCD Dashboard which can unlock the full power of the kit using a special code.
    Please note that this is not the same as a de-restriction switch which has been questionable from a legal standpoint.

    We’ve gone to extraordinary lengths to ensure you get the most out of your conversion kit purchase, with the most robust and durable components today’s technology has to offer. All at arguably the best value for money kits found in the UK.

     
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