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gbj_tester in reply to @hippy

thought I might be able to get her some fast 28s.

28s on 25mm rims is green on my chart. Since the Hypers already roll pretty well, the big gain from getting an actual road race tyre is likely to be aeros and weight.

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frankenbike in reply to @gbj_tester

28s on 25mm rims is green on my chart

No it isn't. Unless I'm even more colourblind than I thought I was. He's got 25mm internal not external.

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gbj_tester in reply to @frankenbike

No it isn't

You're right, it isn't. But it should be :) If the tyres were actually only 28mm wide when mounted, it would be marginal, but a "28" GP4000S or Schwalbe Pro One is going to be well over 30mm on a rim that wide.

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