Specification of the Rear Drive Dual Power 500w Kit
Electric bike kit specifications: Motor: 250W/500W gearless, brushless rear hub motor Usage: In 250w mode the bike can be ridden on the road. When in 500w mode you must be offroad Speed (250w): When in UK road legal mode (250w) the motor reaches maximum speed allowed by UK/EU regulation (i.e. 15.5mph). Speed (500w): When in offroad mode (500w) the motor reaches maximum speed of 20mph. Wheel size: 26inch, 700c, 28inch or 29er Frame Compatability: Requires 135mm clearance Gear Compatability: 3, 6 and 7 speed freewheels Wheel material: Double walled alloy rim with reinforced spokes to withstand extra tension. Wheel Colour: Black rim with silver spokes Throttle: thumb type. Brake levers: Electric levers that also cut the power when applied. Brake compatibility: Compatible with both disc brakes and V-brakes
Battery Options Pannier Battery: 36v/11aH - 250w mode gives 40 miles range between charges - 500w mode gives 20 miles range between charges Frame battery: 36V/14Ah - 250w mode gives 60 miles range between charges - 500w mode gives 35 miles range between charges Pannier battery: 36V/17Ah. Pannier rack supplied with kit - 250w mode gives 75 miles range between charges - 500w mode gives 40 miles range between charges Frame battery: 36V/21Ah - 250w mode gives 90 miles range between charges - 500w mode gives 45 miles range between charges * Range between charges depends on terrain, weight of cyclists, frequent use of PAS, frequency of stops/starts, air pressure in tyres etc. All batteries are easily detachable and come with a charger. The kit is a rear motor-wheel design, removing any issues around front fork compatability. A full installation guide is included. The kit is supplied with a throttle.Pedal Assistance System A Pedal Assistance System is a device that senses your pedalling and makes your kit give automatic assistance, i.e. you do not have to press the throttle throughout your journey. This is included as standard with the 500w kit. To fit the pedal assist sensor you will need a square taper bottom bracket.Use of the 500w Mode Please note that to ride the bike on the public highway the system must be set to 250w mode. We will send you instructions on how to select 500w mode after you have signed and returned a Derestriction Agreement form to us - this essentially says that it is your responsibility to ensure that the correct mode has been selected for public highway use.
When deciding which kit to fit onto your bike you have three things to consider – which motor, which battery and which pedal assist display to choose. Here is our quick guide to help you decide
Decide which motor suits your needs
You have a choice of front wheel, rear wheel and crank motors to choose from. Ultimately it’s your choice and you may already have a strong preference, but here are some of the factors to consider:
- 250w hub motors (front and rear) are geared. This means that the motor spins without resistance. The motors weigh around 3kg
- 500w and 1000w motors are direct drive and do have some resistance. They’re also twice the weight of 250w motors
- You should only fit 500w and 1000w motors on the rear wheel. Do not fit a high powered motor on the front forks.
- Crank motors weigh around 3kg.
- With a hub motor you will keep all of your gears, meaning that it remains practical to use without the power turned on. A crank motor replaces the front gears with a single chain ring, so it’s more likely you’ll need the power more often.
- A 250w motor will give more miles per charge than a 500w or 1000w motor, even if those high powered motors are in 250w mode
- A 250w motor will give a more practical, usable everyday bike. The 500w and 1000w motors are great fun offroad but less practical for day to day commuting.
Choose the battery to suit your rides
You need to decide on which battery fitment you prefer and also select the battery to suit the number of miles you expect to ride. You need to consider:
- If you choose a rear wheel motor then it’s better to have the battery mounted in the frame of the bike rather than on the pannier. Rear wheel motor bikes with pannier batteries are quite back heavy
- When choosing the battery to suit the mileage you would like then please remember that the mileage quoted per charge is for assisted miles, not your overall distance. If you’re freewheeling or have the power turned off then you’re not using the battery.
- Ensure that the frame of your bike suits the battery you prefer. See our “Will it fit” section for further guidance
Decide which pedal assistance display to fit
You don’t have to fit pedal assistance but it transforms the way that you will use the bike and makes riding far more pleasurable than when you fit throttle only. There are two display types to choose from – both do the same thing but have the following practical differences:
- The LCD display has both up and down buttons for changing the power settings. The LED display has only one button which makes it less convenient to choose the power level that you require
- The LCD display has an integrated bike computer
Either display will allow you to choose the level of power that the motor is giving you whilst you cycle, and both have “off modes” so that you can ride the bike without power.
Do you have a question about the Rear Drive Dual Power 500w Kit?
If you can't find the answer that you're looking for below then please click here and ask us a question. If we're online we'll give you an answer immediately, otherwise we'll try our best to respond on the same working day.
Do you have a question? Maybe the answer is listed below.... Q. Will this kit fit my bike? A. Our hub kit will fit most bikes but there are a few checks to do to make sure. See our "Advice" section for more information.
Q. Is the kit easy to fit? A. Yes. The kits are designed for self fitting. If you can change a tyre then you'll be able to fit this kit
Q. How do I choose the high power mode? A. Because this is for offroad use only you will need to sign a disclaimer before we can issue instructions on mode selection. We email a disclaimer form to you for you to sign and return to us - we will then send you instructions. It is very easy to swap between modes.
Q. Can I switch between modes? A. Yes - you can de-restrict to the high power and restrict back to 250w as you require.
Q. Can you pre-fit a set of gears to the wheel for me? A. Yes - please choose this option at the checkout. The maximum nummber of gears allowable for this motor is 7 (7 speed freewheel)
Q. What does the kit weigh? A. It depends on the battery, but work on the basis of 9kg-10kg. You don't notice this weight when cycling because of the power that you get from the motor.
Q. How do I find out my wheel size? A. Take a look at the tyre - this will give you the size that you need. For example it might say 26x1.5, 700cx35 or 28x1.75. You need to take the first part of this size (26, 700c, 28) to select the correct wheel size.
Q. Can I remove the battery for charging? A. Yes. All batteries are locked into place and can be removed as required. You can charge the batteries both on and off the bike.
Q. Is there any resistance on the motor? A. Yes. The dual power motors are direct drive and this causes some resistance
Q. My brake levers are integral with my shifters. What can I do with the auto-shutoff brake levers that you've supplied? A. You have 2 choices. You can either swap the shifters for independent units and fit the brake levers or keep the set up that you have. Most of our customers keep the existing brake levers/shifters. It doesn't make a great deal of difference whether you fit the auto-shutoff levers as when you stop pedalling the motor will stop. So, provided you're not braking and pedalling at the same time it's not an issue.
Q. I have hydraulic brakes. What can I do with the auto-shutoff brake levers that you've supplied? A. Keep the set up that you have. It doesn't make a great deal of difference whether you fit the auto-shutoff levers as when you stop pedalling the motor will stop. So, provided you're not braking and pedalling at the same time it's not an issue.
Q. I have drop bars. What can I do with the auto-shutoff brake levers that you've supplied? A. Keep the set up that you have. It doesn't make a great deal of difference whether you fit the auto-shutoff levers as when you stop pedalling the motor will stop. So, provided you're not braking and pedalling at the same time it's not an issue. It's also worth noting that, unless you fit an accessory bar, you won't be able to fit the throttle and the LED display won't fit. You need the LCD display which clamps onto the bars.
Q. How many miles will I get? A. It depends on the aH rating of the battery. The mileage is listed in the specification but please bear in mind that your overall distance will be further than the mileage listed as when you're freewheeling the battery isn't being used.
Having a problem fitting your kit? Check here for solutions Q. The motor is touching the inside of my forks. What can I do? A. You need to change the order of the washers to create space for the motor. Fit the flat washer behind the torque washer on the inside of the fork.
Q. I've connected everything, the lights are on but the motor isn't working. What can I do? A. Check that the motor cable is pushed in fully. There's a line on the male connector, just above the arrow, that needs to be flush with the female connector.
Q. My throttle is working but the pedal assistance isn't. What can I do? A. Check that the disc is no more than 2-3mm away from the sensor. If it's too far away the sensor won't pick up movement.
Q. I have a pannier battery and the system isn't turning on at the display. What can I do? A. There's a switch underneath the battery - ensure that this is in the "1" position.
Q. I've not fitted the throttle so have a connector that us unused. Can I cut it off? A. No, please don't cut any of the cables. If you have an open connector then place a cap over the end to ensure that no water can get into the cable.