When is it necessary to re-dish a wheel?
08-18-11, 08:04 PM
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When is it necessary to re-dish a wheel?
So I'm planning on replacing the bent-axle in my rear shimano hub (with a 137mm axle) and then spacing it to 126mm (I couldn't find a new axle to get the original 122mm spacing). Assuming I have equal spacers on each side, and I have my frame cold-set to 126mm would the wheel then need to be re-dished?
I'm sorry, I'm not very knowledgeable in this area.
I'm sorry, I'm not very knowledgeable in this area.
08-18-11, 08:06 PM
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Install your wheel evenly between the chain stays. Then look at the space between the seat stays. Does the wheel sit centered directly under the brake caliper mounting bolt? If so, don't worry too much about dishing. If not in the middle, time to measure the dish and work from there.
I hope this is a help.
I hope this is a help.
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08-18-11, 08:09 PM
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As long as you add or remove the same thickness of spacers on each side of the hub it wouldn't matter if you had a 36" axle, the wheel would still be dished properly.
If you add or remove unevenly the wheel will need to be redished. Period. Unless it was dished wrong to begin with!
If you add or remove unevenly the wheel will need to be redished. Period. Unless it was dished wrong to begin with!
08-18-11, 08:18 PM
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There's another criterion in what Khatful is saying, which is chainline. If the spacers are selected for proper chainline (the exact target measurement is somewhat a matter of opinion), and the rim is not centered in the frame, you NEED to re-dish.
08-18-11, 08:49 PM
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Now this is something I was worried about. Sheldon's page on chainline deals with front chainline but for the rear it is unclear.
