RS-80 Wheel not true?
04-10-13, 07:50 PM
#1
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RS-80 Wheel not true?
I bought a set of brand new Shimano RS-80 wheels from Ribble Cycles. Installation went smoothly. After installing them and spinning them, I thought I saw some wobbling when compared to a fix feature like the brake pad. Took out my disc brake runout indicator and checked the wheels. The front is running out of true by .015", the back is .010". Is this normal? What is the expected runout for a new wheel? All the spokes are tight with a squeeze test. These wheels have 0 miles on them. Thanks!
04-11-13, 10:23 AM
#2
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It's fine - actually better than fine. I would actually be very shocked if you could see that kind of an error with your naked eye against a brake pad. .015" is roughly the thickness of a piece of card stock. It is far better to have high and even spoke tension than to have a scientifically laser straight true wheel - it is rarely possible to build a wheel with very balanced tension and not get tiny errors like yours has. A balanced wheel that has a .015" error will be a far far better wheel than a wheel with .0000" error and unbalanced spokes - soon the latter will have much bigger errors than the former.
Enjoy them.
Dave
04-11-13, 10:25 AM
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I bought a set of brand new Shimano RS-80 wheels from Ribble Cycles. Installation went smoothly. After installing them and spinning them, I thought I saw some wobbling when compared to a fix feature like the brake pad. Took out my disc brake runout indicator and checked the wheels. The front is running out of true by .015", the back is .010". Is this normal? What is the expected runout for a new wheel? All the spokes are tight with a squeeze test. These wheels have 0 miles on them. Thanks!
04-11-13, 06:54 PM
#4
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Thanks guys. When you work as a manufacturing engineer in the aerospace industry for 15 years, you look at things a little differently. .015" runout is a mile off in my work place. But it's all relative. I'm just glad I don't have to send the wheels back. Thanks again!
04-11-13, 08:36 PM
#5
SuperGimp
Check your tires and make sure they're mounted correctly! There should be a mold line all the way around the tire just a bit above the wheel that you can use as a visual indicator - if you don't get the tire seated correctly it can make your wheel look terribly out of true.
(don't ask me how I know)
(don't ask me how I know)
04-11-13, 09:14 PM
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Thanks guys. When you work as a manufacturing engineer in the aerospace industry for 15 years, you look at things a little differently. .015" runout is a mile off in my work place. But it's all relative. I'm just glad I don't have to send the wheels back. Thanks again!
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04-15-13, 03:48 PM
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Thanks guys. When you work as a manufacturing engineer in the aerospace industry for 15 years, you look at things a little differently. .015" runout is a mile off in my work place. But it's all relative. I'm just glad I don't have to send the wheels back. Thanks again!
04-15-13, 04:06 PM
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Wow, so cycling is rocket science now? Cool.
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