Some hub motors boost their torque with internal gearboxes (typically an arrangement of planetary (epicyclic) gears in between the stator and the rotor), but since that adds weight, cost, mechanical complexity, and potential unreliability, many do not. Bigger torque brings an added problem: you need to be sure the rest of your wheel is strong enough to cope with the twisting forces a hub motor can deliver, particularly if you're converting something like an ordinary bicycle wheel into a powered wheel. The spokes on an electric bike are shorter and leave the hub at a tighter angle, which can stress them further. Suppose you mount an electric motor on the hub of a basic bike and switch on the power. Since you weigh quite a lot and there's plenty of friction between the tire Yamaha also claims that its CE is the quietest running mid-drive motor it has ever produced, and that means you can use all the pedal-assistance power available, without ever feeling guilty about producing too much electromechanical noise. We have thumb throttles, twist throttles, and half twist throttles. Usually people with twist grip shifters will opt for a thumb throttle, while those with lever shifters could choose between a thumb style or a twist grip. The half twist throttle is safer than the full twist since you are less likely to accidentally turn the throttle while grabbing or walking the bike, but there are some who really like the feel the full grip rotating like on a motorcycle. Assistance levels Different e-bikes have slightly different setups, but most will offer an equivalent of low, medium and high-assistance modes. These usually equate to the motor matching your input, giving one and a half times your input, or doubling it. Great Compatibility]: Fit for any 26" bicycle frame with 3 15/16" front dropout spacing; compatible for universal disc brake and V brake, you can choose the brake you need to use with the wheel, perfect for bicycle assembly and modification

The main purchasing decision when it comes to electric bike motors is mid-drive (providing power through the pedal cranks) or hub motor (providing power through the front or rear wheel). We look at this in more detail below, but as a generalisation, mid-drives are better at climbing in all gears but heavier and pricier, whilst hub motor models cost less and are lighter than mid-drives. Best electric bike motors

Hub motors are attractive from a design standpoint because of their flexibility. They can be used for front-, rear-, or individual-wheel drive. They are compact and hence allow for more room for passengers, cargo, or other vehicle components. They allow for better weight distribution compared to a single motor, and they eliminate the need for many of the drive components in traditional vehicles like transmissions, differentials, and axles, which reduces wear and mechanical losses. [18] [19] High-voltage in-wheel motors must be robust against damage to their high-voltage cables and components. [2] Unsprung weight [ edit ]

Due to their quality and affordability, Bafang products have been used on a massive range of e-bikes; from small startup companies to large name brands like Pedago, Juiced, Aventonand Charge. Patents for electric bicycles with hub motors were granted as early as 1895. [3] Bicycle hub motors are simple, durable, and affordable compared to other designs, but less suitable for high speeds. [4] Hub motors rose in popularity over other designs in the late 2000s and 2010s. [5] Automotive [ edit ] History [ edit ] 1900 Lohner-Porsche "Chaise" battery electric vehicle with two front-wheel hub motors [6] 1900 Lohner–Porsche "Mixte" racecar with four wheel-hub motors [6] For geared motor kits we have the small Bafang G310 (rear) or G311front, the slightly larger Shengyi SX1/SX2, and the very powerful eZeeand GMAC. For direct drive motors we have the premium lightweight and fits-on-all-forks Grin All Axle hub on one end, and the heavier by value priced FH212 and RH212 from 9C on the other. The TSM-A5 motor with an integrated torque sensor fits somewhere in the middle. Regenerative Braking? It might weigh less and be more compact, enabling better frame integration, but the Shimano EP8 is 10Nm more potent than its EP8000 predecessor, delivering 85Nm of output.energy. That's why brushless motors are often more efficient, especially at low speeds. Getting rid of the brushes also saves having to replace them every so often when friction wears them down. speeds (to help with cornering and steering) or torque (to move you through muddy or uneven terrain). What are the problems with hub motors? Handling DC Machine with Solid-State Commutation (in other words, a motor with an electronic instead of mechanical commutator). This is