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Old 12-04-2012, 09:59 AM   #1 (permalink)
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ST Rear Wheel Shifting

Over the last 6 months I have noticed that my rear wheel comes loose. In my opinion this is a bad thing. It took me a wile to figure out just what was happening. Basically the holes in the wheel that fit the pins in the brake/chain assembly have become elongated. This allows the rear wheel to shift under hard acceleration or deceleration. I have tightened it several times and it seems OK for a little while but it always comes back. It is winter here so I can take stuff apart. I am thinking of drilling 3 new holes in the wheel that are 60 degrees off of the current ones and a very close fit to the studs. I have a machine shop at work and some skill in this area so I think I can do this accurately and successfully.

Any comments on this course of action? Any other ideas? Has this happened to any one else? Thanks!
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Old 12-04-2012, 10:14 AM   #2 (permalink)
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Put on a new wheel and new hub/studs before you do something potentially deadly.
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Old 12-04-2012, 11:30 AM   #3 (permalink)
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Hi, Rear wheel nut should be torqued up to 140ftlbs and the nut should have a sprung wire locking ring to stop it coming loose, it should not come loose under any circumstances if it is something is wrong it is not the fault off the locating pins.
Cheers Paul

Last edited by PaulM; 12-04-2012 at 11:33 AM.
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Old 12-04-2012, 11:38 AM   #4 (permalink)
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New holes and proper torque should fix it (locking clip also). You could oversize the holes and machine spacers with the right OD and ID . just a thought

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Old 12-04-2012, 02:18 PM   #5 (permalink)
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Thumbs up Further thoughts

I thought about putting in inserts also. I will do some calculations to see if this a practical approach. In addition I will be closely inspecting the wheel at the points that I intend to drill for wall thickness etc. As near as I can tell there is no special reinforcing in the original location.

The suggestion of replacing the studs is an excellent one. They are really intended to be a static locator and I can tell that they have been hit dynamically quite a few times. The good news is that they are steel whereas the wheel is aluminum hence the aluminum is the material that gives.

The nut is tight and the clip is in place and has not slipped since my last tightening.

There is a lot of force being transmitted through this interface so a mere friction attachment is substandard.

I really wanted to do 2 things by this post: 1. get good advice (already being achieved) 2. To warn and inform the ST community. By the time I figured out why my rear end felt loose (no wise cracks) I had already done the damage.

So whoever reads this: Put you bike on the center stand get some one to lock the rear brake and try to rotate the rear wheel. If it rotates at all even with great difficulty take off your rear wheel and inspect the hole/stud interface. Then we can talk. Hopefully this is an issue unique to me!!
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Old 12-04-2012, 07:51 PM   #6 (permalink)
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Not a common issue, but not the first time we've heard of it either.

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Old 12-04-2012, 09:38 PM   #7 (permalink)
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Quote:
Originally Posted by meis3b View Post
... my rear end felt loose ...
No way we're gonna let that one slip by
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Old 12-05-2012, 05:09 AM   #8 (permalink)
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Quote:
Originally Posted by PaulM View Post
Hi, Rear wheel nut should be torqued up to 140ftlbs and the nut should have a sprung wire locking ring to stop it coming loose, it should not come loose under any circumstances if it is something is wrong it is not the fault off the locating pins.
Cheers Paul
I recall the torque value being 148 newton/meters(Nm), which is more like 107 ft/lbs.
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