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Old 03-10-10, 08:29 PM   #1
Needs the magic spanner
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Swapping rear wheel - derailleur adjustment needed?

Hey Y'all,

I just built up my new ride & everything seems to be dialed in fine. When I swap in my trainer tire/rim, the RD no longer reaches the smallest cog. On my previous rig, this was never a problem.

Some quick background:

"Normal" rear is Ksyrium SL
Trainer rear is Xero Lite(?)

Both have identical 12-25 shimano cassettes.

The only "odd" thing that I've noticed is that I did not use the Shimano supplied spacer on the Ksyrium- I only used the Mavic spacer. I do not notice any play in the cassette/freehub assembly this way. When I had both spacers on the Ksyrium, the RD hesitated (alot) when shifting to the smallest cog- in spite of all possible adjustments. It's like the (shimano) spacer put the smallest cog just out of the RD's reach- even with the limit screw all the way out.

I should also add that my other set of Ksyrium SLs used both spacers and shifted fine on the old bike. I no longer have either, so I can't test it here.

Any ideas would be great!
"Go that way, really fast. If something gets in your way- turn." - Charles DeMar
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Old 03-10-10, 08:35 PM   #2
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The shimano spacer is only needed on shimano 8/9/10 hubs.
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Old 03-10-10, 09:14 PM   #3
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Sometimes you luck out but it's not uncommon for a derailleur adjustment to be required after changing wheels.
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