running 2.25 front and 2.1 rear thunder burts on zipp xplr, messures 57mm front (~8mm clearance) and 53mm rear (~5mm clearance). shocked at how quick this bike feels, i thought it would be slow and sluggish compared to my road bike with 32mm gp5000s but it honestly feels the same. the 2.25 tire also gives me tons of confidence on rough descents!
by branbranko