Grins All Axle V3 Fat Bike Motor

[jonpad01]

45mm Fat Deposits

Grin Technologies

ebikes.ca

What do you guys think about this motor? 45mm magnets, 205 or 212 rotor diameter (not sure which). Maybe it will be rated around 2000 watt?

In the motor simulator, it might be comparable to the XOFO DD45. I have the QS 205 on my fat bike, not expecting the same amount of torque, but hey if its pretty close, I'd really love to have that 10 tooth cassette gear so I can pedal at 30MPH. I currently have a 5 speed freewheel with a modified spacer on it, there is barely enough axle left to put a torque arm on that side.

Setting custom motor parameters doesn't seem to include magnet width or rotor diameter.

Is anyone else making a large direct drive motor like this that can fit on fat bikes and use a cassette or a 5-6-7 speed freewheel? If yes can you list the vendor?

 

[chuyskywalker]

I preordered. I had the XOFO45 and when the bike it was on got stolen I really missed it. Can't wait.

Also, it looks like they just added the FAT motor to the simulator.

 

[G8trwood]

The torque curve on the slow winding looks pretty good. Better than the 602 I was looking at

 

[Chalo]

I'd really love to have that 10 tooth cassette gear so I can pedal at 30MPH.

Those are for show, or for wrecking your chain so it can wreck everything else in turn. There are very good reasons 10t sprockets haven't been available until recently, and soon enough people will relearn them and stop doing that.

 

[Bullfrog]

45mm Fat Deposits

Grin Technologies

ebikes.ca

What do you guys think about this motor? 45mm magnets, 205 or 212 rotor diameter (not sure which). Maybe it will be rated around 2000 watt?

In the motor simulator, it might be comparable to the XOFO DD45. I have the QS 205 on my fat bike, not expecting the same amount of torque, but hey if its pretty close, I'd really love to have that 10 tooth cassette gear so I can pedal at 30MPH. I currently have a 5 speed freewheel with a modified spacer on it, there is barely enough axle left to put a torque arm on that side.

Setting custom motor parameters doesn't seem to include magnet width or rotor diameter.

Is anyone else making a large direct drive motor like this that can fit on fat bikes and use a cassette or a 5-6-7 speed freewheel? If yes can you list the vendor?

Just to jump on Chalo's comment a little bit...the 10T sprocket is very small and there are two problems:

A. The small radius of curvature requires your chain to flex more which will wear your chain faster than a larger radius.

B. The number of teeth that are engaged with the chain is very small and you could have the sprocket slip inside the chain...which could cause you to crash or be unable to use that gear when you want to apply very much torque to the drivetrain.

FWIW, I don't like to go with less than 13 teeth.