Very helpful information

[Nvreloader]

For anyone that doesn't have or know all the facts/information about DIY ebike building,
and which elect motor may work the best for them, and is thinking about building one.
I found this site/info very helpful and full of facts etc.

CHOOSING A DIY CONVERSION MID-DRIVE MOTOR

Compares the most popular mid-drive motors for DIY conversions including: BBSHD, BBS02, M625, TSDZ2, CYC X1 Pro Gen 3, CYC X1 Stealth Gen 3

www.electrifybike.com

YMMV

 

[indianajo]

This website promulgates the following common myth:

Mid-drive motors are found on higher-end ebikes and come with distinct advantages over hub motors.

• Motor Efficiency: Able to be appropriately geared for speed and hills
• Torque Performance: Geared for uphill terrain and riding into the wind

• 5. Longer Battery Life: Doesn’t bog down from being geared too high

The last three advantages all come from having a transmission - the motor drives the chain and gets to use the gears on your bike. Hub motors are stuck in one gear and cannot use the bike’s gears. Because mid-drive motors drive the bicycle chain, the bike’s gears effectively become the motor's transmission allowing the rider to climb hills in a low gear and then shift into a high gear where it is downhill or flat to go fast.

The above myth avoids the fact that 99.9% of ebikes sold the gears only decrease the torque of the motor and increase the speed. Only bikes in the >$5000 category have a rear sprocket bigger than the motor sprocket, which is typically 46 teeth.

Geared hub motors have no trouble exceeding 1000 rpm rotor speed. Only the drag of the wind or the power required to lift the load up grades limits their speed.
The main advantage mid drives have is that the windings cool better at slow speeds than geared hub drives. Having torque sensing control is a significant market advantage over 90% of geared hub drives.