Rear Heavy Duty freewheel ?

livetek

livetek

10 mW
Joined
Feb 12, 2015
Messages
34
Location
France
Hello,

For a Non-hub ebike, with theses specs :
- direct drive (motor in the extended swing arm)
- 15KW outrunner motor
- Belt Drive (HTD5M)

I would like to find a rear heavy duty freewheel, I've seen this one but it's a front freewheel :
http://sickbikeparts.com/front-freewheel-ultra-heavy-duty/

I search something who can be attached directly on the rear hub.

The idea is taken from this project :
https://endless-sphere.com/forums/viewtopic.php?f=28&t=34451

Thanks for your help :)
 
[strike]You can use that on a rear hub, too, it's just that you won't be able to remove it with the tool for that purpose (cuz the tool slots will be against the hub).[/strike]

AFAIK there is no lip on the tool side so it should go on without modification.

These have been used on the rear for dual-drive systems, where a single speed regular freewheel has been used for the pedals, and the SBP FW was used for the motor drive input, with a threaded piece (often a BB cup) between them, and one of them threaded partly onto the threaded piece and partly onto the hub.
 
I would run a fixed rear gear with that much power. Any freewheel will be both a source of failure and also impair how precisely the power is applied. Modern controllers can provide a virtual freewheel for coasting if needed although personally I'd rather have a little engine braking.
 
amberwolf said:
You can use that on a rear hub, too, it's just that you won't be able to remove it with the tool for that purpose (cuz the tool slots will be against the hub).
Click to expand...

The tool interface is accessible in either case, because it faces right on the rear, but left on the crank.

SBP probably has small chainrings that could work as rear sprockets.
 
Thanks all for your answer, I've now the confirmation it's all OK :)

Grantmac said:
I would run a fixed rear gear with that much power. Any freewheel will be both a source of failure and also impair how precisely the power is applied. Modern controllers can provide a virtual freewheel for coasting if needed although personally I'd rather have a little engine braking.
Click to expand...

Yes I was thinking that too, you mean something like this (on the right) ?
freewheel.jpg


It would be cool to have a plug & play fixed freewheel, the one reason I choose the SBP one is because it has holes to install a custom rear sprocket (with belt).
If you have a solution for this I'm open :)
 
Grantmac said:
I mean no freewheel at all. That part is to mount a freewheel onto a brake rotor mount, or so it looks.
Click to expand...

Thanks,
Why not get a dual disc hub converted to rear hub?
https://www.aliexpress.com/item/4001280500777.html?spm=a2g0o.search0302.0.0.74684f3asOFL8U&algo_pvid=131bdf62-2409-4374-83dd-a32c2d7b3c84&algo_expid=131bdf62-2409-4374-83dd-a32c2d7b3c84-1&btsid=0b0a187916120170621651832e6ca2&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_
 
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