Torque Arms on Front Suspension Fork?

Joined
Nov 27, 2009
Messages
201
Location
Fort Collins, Colorado
I have read several posts here concerning front hub motors and torque arms and realize that this may be opening an old can of worms but I have not seen anything specifically on a front hub motor on front suspension forks. Let's start a few months back. I purchased a front hub kit and installed it on a mountain bike with an RST 191 suspension fork. The kit is a 600W 36v WE BL-36 kit and seems to have a peak of 850W (according to the Watts Up). I have logged over 700 miles on this kit and have had no problems. I still have not installed a torque arm or washers for the quick release drop outs. I am creating a 48V pack and am now becoming concerned about spin out of the axle or even breaking the drop outs. Is this something to really worry about when we are talking about a new possible peak of 1200W? Is there a recommended torque arm and washer set that I should be looking at? Here are some pictures of the current set up.
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I appreciate the future responses.
Dan
 
If that fork is alloy as it appears, and not steel, you'll definitely want torque arms. John in CR's most recent build thread has some pics of modified forks/dropouts you could use for this, but would possibly require removing the existing dropouts.

Otherwise you can look at some of the existing torque arms for regular forks and they may fit yours, too. It is also possible to make torque arms of a custom shape just to fit that specific fork.

I have a Manitou/Skareb alloy fork I am considering putting a geared hub on, and will probably have to make some for it just to keep from worrying myself so much. :)
 
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