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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 02-18-08, 03:21 PM   #1
rjjasick
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Ultegra RD Pulley Replacement

I need to replace my RD Pulleys. For only a few more dollars, I can get a Tacx ceramic replacement set. The difference is that it's a 10T instead of the 11T that the other OE sell. Does it make a difference if it's only a 10T?
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Old 02-19-08, 03:59 PM   #2
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That means that it's smaller diameter and the chain path will be slightly different. I don't know if that will make a difference in shifting, but it very well might. Best to play it safe since ceramic bearings in the jockey pulleys aren't going to gain you anything anyway. You could use sleeve bearings back there and never notice a difference: the bearings are very lightly loaded.
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