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  1. kolchek

    Michelin tyre sizes accurate?

    I'm looking at buying some Michelin Pilot Sport tyres online & I was wondering if anyone knows how accurately Michelin label their tyre sizes. I bought a pair of 32mm Continental Top Contacts a while ago & when mounted they were waaay narrower than the 32mm Bontrager Race-Lites they were...
  2. kolchek

    BB spec-check

    Hi everyone, I'm not 100% bike-tech savvy but here goes: My BB needs replacing [play & a bit crunchy], the specs on the stock one are 68 x 124.5. The current chainline is about 50 mm. Seat-tube diameter is 34mm. The clearance between frame & chainring now is 2 mm max. The largest chainring...