Pulley bolts give me problems

Discuss light weight issues concerning road bikes & parts.
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Stockie
Posts: 350
Joined: Mon Aug 20, 2007 7:24 pm

by Stockie

I installed some Extralite pulleys on my Sram Force derailleur the other day but ran in some troubles.
When i crank down the pulley bolts, the pulleys don't spin smooth anymore and get pinched, which causes drag.
But when i loosen the pulley bolts, the outer cage can 'move' in the slots for the countersunk pulley bolts. The outer cages doesn't fit tight.
Anyone had this before or knows a solution?
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Stockie
Posts: 350
Joined: Mon Aug 20, 2007 7:24 pm

by Stockie

Nobody? :(
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by Weenie


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bura
Posts: 841
Joined: Mon Mar 01, 2010 8:07 pm
Location: Civitatis Vaticanae

by bura

Extralite lists their pulleys as Shimano and Campy compatible but no Sram.
Does your Sram Force have some different sized pulley bolts?
In that way that the upper pulley original bolt is a M4 bolt and the bottom one is a M5?
If yes you should have a slight play in your upper pulley but having described problems with both pulleys is a very special case.
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Stockie
Posts: 350
Joined: Mon Aug 20, 2007 7:24 pm

by Stockie

I use a sleeve for the M4 pulley
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lechat
Posts: 260
Joined: Thu Sep 30, 2010 3:32 pm
Location: S.E. TN

by lechat

Hard to tell without seeing them in person. The 2 discs that sandwich the bearing shouldn't bind it if they're the correct diameter. If the bearings are the same diameter as the original one's, you could try the Sram discs to see they bind also.

by Weenie


Stockie
Posts: 350
Joined: Mon Aug 20, 2007 7:24 pm

by Stockie

I solved the problem.
The conical head of the pulley worked a little bit as a wedge and pushed against the bearings.
With the demel i made the diameter or the sleeve a little bit bigger on the outside, so that it matches the conical head of the bolt.
Attachments
pulley bolt kopie.png
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