thunderstorm80
1 kW
- Joined
- Mar 29, 2016
- Messages
- 383
Hi,
I understand that for a wide stator machines, there is no room left for a cassette-hub, while the older (but short) freewheel hub thread allows to put just the one sprocket you need or few of them.
But - for moderately (and narrower) powered motors, like the H35XX series - why don't they use cassette-hub? In those days, 7 speed gears is a thing from the past and belongs to the very low end bicycles. Downgrading your gearing system from 9spd to 7 seems unrealistic for a bike which is supposed to be a pedal assist bicycle - in my case.
Grin has 9C 30XX rear motors with the modern cassette-hub, but seems they stopped stocking them. I wonder why?
And now more specifically - I consider the H3525R rear DD motor for a touring bike I build from an 8 speed bike. I must have the full gearing range, can't compromise there.
Is it possible to fit an 8 speed cassette if my rear dropout is a standard 135mm one? Do such 8 speed cassette for the old freewheel hub exist?
I heard rumours that even if you manage to fit it there, it's not recommended - since the length of the cassette is already causing significant bending torque (the hub threads are quite short in length), which results in bent axle over time. Is it true?
Roy
I understand that for a wide stator machines, there is no room left for a cassette-hub, while the older (but short) freewheel hub thread allows to put just the one sprocket you need or few of them.
But - for moderately (and narrower) powered motors, like the H35XX series - why don't they use cassette-hub? In those days, 7 speed gears is a thing from the past and belongs to the very low end bicycles. Downgrading your gearing system from 9spd to 7 seems unrealistic for a bike which is supposed to be a pedal assist bicycle - in my case.
Grin has 9C 30XX rear motors with the modern cassette-hub, but seems they stopped stocking them. I wonder why?
And now more specifically - I consider the H3525R rear DD motor for a touring bike I build from an 8 speed bike. I must have the full gearing range, can't compromise there.
Is it possible to fit an 8 speed cassette if my rear dropout is a standard 135mm one? Do such 8 speed cassette for the old freewheel hub exist?
I heard rumours that even if you manage to fit it there, it's not recommended - since the length of the cassette is already causing significant bending torque (the hub threads are quite short in length), which results in bent axle over time. Is it true?
Roy