Dishing a Westwood rim pattern wheel?
01-30-16, 09:24 PM
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Dishing a Westwood rim pattern wheel?
I'm trying to build (or rather have someone else build) a single speed hub onto a Westwood pattern (28 x 1 1/2") wheel for my Phillips. Today I discovered that the minimum chainline of the hub with the freewheel installed is about 3-4 mm too far out relative to the chainwheel. Is it possible to push the hub over to the left side and have the wheel built asymetrically to keep the rim centered in the dropouts? Do you forsee any issues with doing this on a Westwood pattern rim other than aesthetics?
01-31-16, 12:26 PM
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Hmm. It seems like you could do it; the question is why.
It sounds like currently either the hub or the freewheel is too wide. If the SS hub is a coaster-brake model, I'd be pretty cautious about how much torque it would put on asymmetrically-tensioned dished spokes.
Given that you're paying somebody else to build it anyway (so, most of the cost will be in labor), would it be a better idea just to get a hub in the proper size and build a symmetrical wheel?
It sounds like currently either the hub or the freewheel is too wide. If the SS hub is a coaster-brake model, I'd be pretty cautious about how much torque it would put on asymmetrically-tensioned dished spokes.
Given that you're paying somebody else to build it anyway (so, most of the cost will be in labor), would it be a better idea just to get a hub in the proper size and build a symmetrical wheel?
01-31-16, 03:50 PM
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Hmm. It seems like you could do it; the question is why.
It sounds like currently either the hub or the freewheel is too wide. If the SS hub is a coaster-brake model, I'd be pretty cautious about how much torque it would put on asymmetrically-tensioned dished spokes.
Given that you're paying somebody else to build it anyway (so, most of the cost will be in labor), would it be a better idea just to get a hub in the proper size and build a symmetrical wheel?
It sounds like currently either the hub or the freewheel is too wide. If the SS hub is a coaster-brake model, I'd be pretty cautious about how much torque it would put on asymmetrically-tensioned dished spokes.
Given that you're paying somebody else to build it anyway (so, most of the cost will be in labor), would it be a better idea just to get a hub in the proper size and build a symmetrical wheel?
01-31-16, 08:42 PM
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I think it's that the freewheel is too wide. My Sturmey Archer freewheel body (new production) is about 18 mm thick (not including the notches that come off the body), with the cog in the center. This means that the cog sits about 9mm from the end of the threads on the RH side of the hub. Out of curiosity, does anyone know if this offset is normal for single speed freewheels? Would I be better off with something else?
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02-01-16, 01:08 PM
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Well, I wouldn't have mentioned dishing the wheel unless the guy at the bike shop mentioned it. But now that I think about it more, you are right--it doesn't sound sensible. I think what I'm going to do is just sell the hub + parts and lace an AW hub to it. Makes sense to have 3 speeds anyway.
02-01-16, 01:14 PM
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"Dish" originally meant off-center but nowadays it generally refers to centering the rim over the axle's locknuts, whether or not that results in an asymmetrical wheel.
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
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