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UCI Tire Measurement Process 2011?
Just curious if anyone has been observing the tire check process during this season's USGP or other UCI events for the elite riders?
Last year at the USGP New Belgium Cup in Ft. Collins, they were using a very pointy metal vernier caliper tool. I don't recall how they measured at Nationals in Bend, IF they even did. Not sure how they are administering the rule this year. Last year, as we funneled into the start grid, we were each individually checked at the front tire. Has anyone observed a tire getting rejected? I can squeeze a 33mm tool over a 33.5-34 mm-ish tire, but it clearly isn't a perfect, smooth fit w/ very little edge contact. Also, if I measure at a point between treads that only pinches the casing that's different than if I do it at a spot where there is a tread block poking out a bit...
I made a jig out of a 2x4, creating an exactly 33mm wide slot that is deep enough for the entire inflated tire to be slotted into, and I can easily force it over any of my tires up to 34mm, inflated to 32psi. My tool effectively mimics what the metal tool that cyclocrossworld.com does.
(I posted a duplicate topic on the RBR.com site cyclocross forum)
Replies to This Discussion
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Permalink Reply by Chris Mayhew on
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The should be using a horseshoe shaped object that is 33mm wide. The vernier calipers are a bad idea. Ask the 3/4 woman in new England who got her tire sliced by the vernier caliper.
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Permalink Reply by DStudley on
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I think it is going to be a matter of who the official is, but my experience at Starcrossed was they walked around checking with a plastic U shaped device. Easily squeezed it over my Fango 34 tires (technically the tires measure right a 33mm at 30psi or did when new), but there was at least one racer that he had let out a few pounds of pressure to make the test tool fit. I certainly had one of those moments when I saw them checking Masters 1-2 racers, but they literally considered it a pass if it squeezed over easily.
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Permalink Reply by Mark Lorie on
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Are they checking the Masters 35+ categories at the USGP events? Not sure my Grifo 34s will pass...
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