Hope Pro 5 hubs.

[Amber Valley Guy]

You're correct, just found this image from Hope:

 

[irie]

If you are looking for the amount of slack before take up of drive surely that is defined by the number of teeth on the ratchet? It's a 54 tooth ratchet still so 360/54= 6.6°? ....not that it makes much difference on an emtb since the sprag/one way bearing in the motor will mostly define it.

Motor slack and ratchet slack are additive.

 

[John_A]

Just for my own clarification. Is there no difference between a pro5 Ebike and an regular pro5 other than the freehub?

 

[Goughy75]

Very interesting thread.
I'm on the verge of buying the Fortus 5 SC 30 for my Giant Reign e+2. But the Ebike version is making me think twice. Not sure which one to go for. The lighter SC

 

[Goughy75]

Or heavier Ebike version? I ride on The Wrekin mostly which has extreme steep sides and also trail routs.

 

[John_A]

Or heavier Ebike version? I ride on The Wrekin mostly which has extreme steep sides and also trail routs.

Not worth saving a few grams on an e-bike hub when the bike is 23kg. Durability is much more important IMO

 

[Redders473]

Very interesting thread.
I'm on the verge of buying the Fortus 5 SC 30 for my Giant Reign e+2. But the Ebike version is making me think twice. Not sure which one to go for. The lighter SC

I wouldn't run a SC unless it's on the front. And the ebike freehubs are steel and have less POE. I've been running the normal pro5 over a year and zero issue's.

 

[Goughy75]

Thanks for the information. Think I will go for the stronger ebike wheel.
There is 110g difference in the weight. Don't know if that would make much difference to how the wheel performs.

 

[Amber Valley Guy]

Just for my own clarification. Is there no difference between a pro5 Ebike and an regular pro5 other than the freehub?

If you look at the picture I posted above from Hope for it's ebike specific rear hub (you may have to zoom it up), you'll see all 6 pawls engage at the same time, instead of 3, hence the 54 POE instead of 108 for the non ebike Pro 5 rear hub.

 

[John_A]

If you look at the picture I posted above from Hope for it's ebike specific rear hub (you may have to zoom it up), you'll see all 6 pawls engage at the same time, instead of 3, hence the 54 POE instead of 108 for the non ebike Pro 5 rear hub.

Yes, I see that. Is that the only difference other than the freehub body material?

 

[R3Z3N]

^Correct, freehub body and pawl offset are the only differences.

 

[John_A]

^Correct, freehub body and pawl offset are the only differences.

thanks for that

 

[ForMartha]

I know it’s pretty old thread, anyone tried the SC version on light eMTB?