Pedalling one of these with the power off (particularly uphill) can be quite a challenge. Good luck pedalling! Direct drive hub motors are not only heavy, but you have the resistance of the motor to overcome. Of course, if you are only planning on using your bike for relatively short journeys then a 10Ah battery should be fine. This is going to be the most expensive part of the conversion. A direct drive hub motor is the least energy-efficient electric bike motor, so you will not get a particularly good range out of something like a 48v 10.4Ah battery, unless you are frugal with the power, and pedal a lot.Ī good starting point for a battery would be a 48v 17.5Ah battery with a 30A BMS. At the very least you will need a good 48v or 52v battery with a minimum continuous current rating of 30A – the controller will draw a maximum of 26A.Īnother thing to consider is the battery range. I have recorded speeds of around 30mph on the flat (without pedalling). When installed properly, these kits will turn your humble bicycle into quite a fast electric bike. ![]() Something you don’t want happening at speed! Performance I would highly recommend purchasing one of these, as it will prevent the motor axle from popping out of the dropouts. This kit does not come with a torque arm. I would not recommend the front motor if you have disc brakes, I have fitted a few of the front hub motors and the brake calliper nearly always rub on the motor, regardless of adjustment. On a motor with this kind of power output, it would be wise to purchase the sensors (especially if you are using a throttle). If you have hydraulic brakes, the brake levers supplied will not be compatible, so you will either need to purchase separate cut-off sensors or not bother at all. When you are indexing the rear gear shifting, you will need to set the ‘low’ limit screw on the rear derailleur, otherwise it will rub on the motor casing when in 1st gear (largest cog on the rear freewheel). I would recommend buying a pack of spokes and a wheel truing stand, for ongoing maintenance. If you need to replace a broken spoke, you will need the correct length and gauge. If you hear a ‘clicking’ sound when riding, you will need to check the spokes for tightness. Hall sensor failure has occurred on maybe 3 or 4 units, and I have had one controller failure, and one LCD pack-up.Īnother issue you will encounter is broken spokes. I have installed at least 50 of these kits over the last 3 years, and I have only ever had a couple of long-term issues reported by customers. For more information, read our article on UK e-bike laws. I’m not one for rules and regulations, but you need to be made aware of the potential legal implications before you purchase and install one of these kits. US federal law is different and allows 750w and 20mph, so technically this motor would still be illegal there. I have looked into the law and it states quite clearly that the motor has to be ‘rated’ at 250w continuous. There is a plug on the controller, that when connected limits the output to 250w and speed to 15.5mph. This motor is rated at 1000w and is not speed-limited. You would only legally be able to ride your bike on private land. ![]() ![]() If you are in the UK, EU or Australia then the maximum continuous power output for an electric bicycle is 250w, with a speed limit of 15.5mph (25km/h) anything above that would be classed as a moped and subject to the same rules and regulations. I have successfully run a 1000w Voilamart hub motor on a 45A controller with a 52v battery – producing over 2000w of peak power, with no reliability issues. They do not have any internal moving parts (like geared hub motors) and they can generally handle quite a lot of power. One benefit of direct-drive hub motors, is they are cheap to manufacture, and fairly reliable. This kind of ebike motor may have seemed high-tech 20 years ago, but it is now considered old-hat when it comes to electric bike motors. Direct drive motors have been around for years, and the principle is based on tried and tested technology. The Voilamart kit uses a simple brushless DC direct drive hub motor. Installation manual Voilamart rear wheel 48v 1000w ebike conversion kit with LCDīuy the 1500w kit from eBay Motor Specification.Plastic wiring coil (for tidying up the cables).Brake levers with cut-off sensors (for cable brakes only).Throttle with battery indicator display.48v 1000w Rear wheel direct drive hub motor laced into a 26″ double-walled alloy rim with heavy-duty spokes.Voilamart rear wheel 48v 1000w ebike conversion kit (without LCD)
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