Bionx electric bike kit guide
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Introduction to Bionx Electric Bike Conversion Systems

Thanks for taking the time to research your BionX bike kit purchase! This guide will help you answer most of your questions. If you do have more feel free to contact us, we'd be happy to get back to reply to your emails or talk to you on the phone!

Do you want to convert your bike to an electric bike? The BionX electric bike conversion kit is the top-of-the-line conversion kit on the market. The BionX kit offers a wide variety of functions, features, and customizable options yet it is the lightest, most streamlined set-up available.


Quick Links to Topics:

1. How does the BionX kit work?
2. Why doesn't BionX make a 1000 watt motor?
3. How do I install my Bionx kit?
4. What's included when I order?
5. Regenerative braking.
6. Built in bicycle computer.
7. Will the BionX work on my bike?
8. Battery options.
9. Is the BionX kit compatible with my style of shifter?
10. Additional BionX motor specifications.
11. Additional BionX battery specifications.
12. Don't forget, you'll need a "freewheel" too...


1. How does the BionX kit function?

Once the BionX kit is installed on your bike (simple instructions below), you'll find a new world of riding in front of you. The BionX kit's main feature is its pedal assistance. Simply put, 'pedal assistance' is an amazing feature in which the motor will offer you assistance as you pedal. By pressing down on the pedal with your foot during normal riding you activate the motor, so you don't have to think twice about it. This means that you can pedal lightly and have the motor do the rest of the work, pedal effortlessly, extending the range of your trips by conserving your energy, and getting to work without breaking a sweat. If you so desire, you can also use the built-in throttle. By pedaling once or twice and then activating the throttle, you can sit back and let the motor do all of the work.

It doesn't stop there. By pressing a button on the control console (mounted on the handlebar), you can adjust your pedal assistance as you ride so that the motor matches 25% of your effort, 75% of your effort, 150% of your effort, or 300% of your effort. At 25%, you'll find that a lot of the edge is taken off of the hills and you're still getting the exercise you want. At 300%, riding will be an absolute breeze.

2. Why doesn't BionX make a 1000 watt motor?

You may wonder whether having more "watts" automatically makes an electric bike kit better. The truth is, no, it has nothing to do with it. The difference between a motor rated for 100 watts and one rated for 1000 watts is $10 more copper wire wound up inside. That alone doesn't translate to a better experience. At NYCeWheels we believe that the best kit is the one that works the best as a whole. BionX is a perfect example of how a well-engineered and long perfected product can outperform other so called "high power" bike motor kits.

By working with you as you pedal, the BionX provides a feeling of strength and assistance that is unmatched by anything else on the market. A sensor in the rear wheel measures how hard you pedal and delivers as much - or as little - assistance as you want. Plus you've got a throttle too, just in case you want to cruise without pedaling. Everything is controlled by a clear and straightforward console on the handlebars. That way the power is always at your finger tips!

3. How do I Install the BionX System?

Follow our BionX Installation guide for a step by step installation manual of the BionX Conversion Kit on your bike.

4. What's included in your BionX purchase?

We detail this all clearly in our "What comes with a BionX kit?" article.

5. Regenerative braking

The BionX kit also offers a feature called regenerative braking. When activated - by pulling the rear brake lever - this feature helps you recharge your battery as you use your brakes. It won't fully recharge the battery, but when used effectively it can add about 5 miles to your range. This feature is generally used on stretches of downhill riding when you don't need any assistance from the motor. This motor braking force also helps you reduce wear and tear on your brake pads.

6. Built in bicycle computer

The control console also offers many other features aside from setting the level of pedal assistance, regenerative braking, or throttle power. It also includes a battery charge indicator that reflects how much life you have left on your battery until the next recharge. This is useful in managing your battery charge throughout your trip. It also displays your current speed, your average speed, the distance you've traveled, your total odometer for the kit and the time. A built in back-light allows you to read the screen in the dark.

7. Will the BionX work on my bike?

The BionX kit can be installed on almost any bike. You can put a BionX kit on standard bikes, recumbents, folding bikes, tandems, trikes... you name it. BionX kits will work with 700C, 26 inch, 24 inch and 20 inch wheels so long as the spacing of the drop outs is 135mm or 5.3 inches. There are only 2 limitations: you must use the kit in the wheel that drives the bike - the one with gears attached to it, and you cannot use the BionX if your drive wheel uses an internal hub - where all the gears are inside the hub.

You have three different motor options to choose from:

All Bionx motor wheels are compatible with both disc and rim brakes.

8. Battery types and range

The BionX kit uses high quality Lithium Manganese batteries. We've found these batteries to have a lifespan up to 5 years of use! That's incredible given many electric bikes we've worked with will typically have a 2 year life span. The battery is contained in a hard case that either mounts on a rear rack or onto the space your water bottle would normally go. The battery can be locked in place with a key to prevent it from being stolen or tampered with.

Battery range is very difficult to calculate as it is affected by a huge number of variables including the rider's weight, riding style, the number and duration of inclines, headwinds, and temperature. That said, a rider of average weight riding under normal conditions should expect to get about 10 miles per charge if they are using the throttle alone (without pedaling at all) and up to 60 miles per charge if they are consistently riding at the weakest level of pedal assistance (where the motor matches 25% of the effort you put in.)

9. Is the BionX kit compatible with my style of shifter?

The BionX system can be installed on any bicycle with a standard derailleur shifting system, but will not work with a hub shifter, as the hub space of the rear wheel will be occupied by the motor. The BionX kit will work with 7, 8, or 9-speed freewheels. (Note: This does not reflect the total number of speeds your bike has, but simply the number of cogs on your rear wheel. If you count seven, eight, or nine cogs on the rear wheel then you're good to go. For example, you might have a 21-speed bike that has 3 cogs up front and 7 cogs in the rear, making for a total of 21 speeds.)

As for using your bike's mechanical shifting when riding, use it just like you normally would if your bike didn't have any electric assistance! Since you're still pedaling, if you're in the appropriate gear your pedal assistance will be that much more effective and you'll help to conserve your battery life even more.

And, to further assist you in selecting the best BionX kit for your needs, we've provided more detailed specifications on the different motor and battery options below.

10. More about the three different motor options:

The 250 watt BionX motor weighs just under 8 lbs.
This motor offers 250W of nominal power (during regular use) and 450W of peak power (for short durations, when you need it to.)
Further motor specifications for those curious:
Torque: 7 Newton-meters25 peak

The 350 watt BionX motor weighs just under 9 lbs.
This motor offers 350W of nominal power (during regular use) and 700W of peak power (for short durations, when you need it to.)
Further motor specifications for those curious:
Torque: 10 Newton-meters/32 peak

The 500 watt BionX motor weighs just under 9 lbs.
This motor offers 500W of nominal power (during regular use) and 1200W of peak power (for short durations, when you need it to.)
Further motor specifications for those curious:
Torque: 8.2 Newton-meters/28 peak

11. More about the four different battery options:

The 24 Volt Li-Ion (Lithium ion) BionX battery, used in the BionX PL250, has a capacity of 9.6 Amp-hours and weighs just over 6 lbs. This battery comes in a hard case or a soft trunk bag and is used with the 250W motor. When properly maintained, Li-Ion batteries last roughly 800 charge cycles before the cells need to be replaced.

The 36 Volt NiMH (Nickel Metal Hydride) BionX battery, used in the BionX P350, has a capacity of 8 Amp-hours and weighs approximately 14 lbs. This battery comes in a soft, durable trunk bag and is used with the 350W motor. When properly maintained, NiMH batteries last roughly 500 charge cycles before the cells need to be replaced.

The 36 Volt Li-Ion (Lithium ion) BionX battery, used in the BionX PL350 and the P500, has a capacity of 9.6 Amp-hours and weighs just under 7 lbs. This battery comes in a hard case or a soft trunk bag and is used with the 350W and 500W motor. When properly maintained, Li-Ion batteries last roughly 800 charge cycles before the cells need to be replaced.

12. Freewheels

Get a freewheel here. You'll need them on your rear wheel for gearing when you install a BionX electric motor kit.