XCO and XCM internal rim widths have been increasing over the past years from 20mm being the norm years back, to the last few years 25mm being the sweet spot. Now 30mm is trending and Nino most recently won the Cape Epic 2019 on 30mm internal rims with tire inserts. So what does science say and is w…

XCO/XCM MTB Internal Rim Widths (Science Asks Wider Better?)

MI-XC April 2, 2019, 11:12am 2

Personally I run 24mm inner width on 2.35 and 2.25 tires. It seems to put the corner knobs in the right spot.

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