Specification of the Mid Crank Drive Electric Bike Kit
Motor: 250W Crank drive motor Pedal Assistance: Motor automatically starts when you start pedalling. Power control via handlebar mounted buttons Throttle: thumb type. Brake levers: Electric levers that also cut the power when applied.Battery Options 7aH Bottle Battery - approx 25 miles per charge 7aH Pannier Battery - approx 25 miles per charge. Pannier rack supplied with kit 11aH Pannier Battery - approx 40 miles per charge. Pannier rack supplied with kit 14aH Frame battery - approx 60 miles per charge 17aH Pannier battery - approx 75 miles per charge. Pannier rack supplied with kit 21aH Frame battery- approx 90 miles per charge Depending on terrain, weight of cyclists, level of PAS, frequency of stops/starts, air pressure in tires etc.. The kit is supplied with both throttle and pedal assistance system.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. The mid drive kit is supplied with the latest LCD display. The display can be mounted in the centre of the handlebars and shows distance, speed, battery charge and power selection level (1-3). The on-off and power selection control are mounted remotely next to the brake lever.
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 Mid Crank Drive Electric Bike 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. Crank kits will fit most bikes with a 68mm or 73mm bottom bracket. See our "Advice" section for more information.
Q. Is the kit easy to fit? A. If you're comfortable taking bikes apart then it's easy to fit. You need to be able to remove the cranks, bottom bracket and front derailleur - if this is something that you can do then the rest is straightforward.
Q. What does the kit weigh? A. It depends on the battery, but work on the basis of 6kg-7kg. You don't notice this weight when cycling because of the power that you get from the motor.
Q. Do I keep all of my gears? A. You keep all of the gears on the rear wheel but the front is replaced by a single chain ring.
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. 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.
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. 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.