Proterra Light i25 wheels are for all you gravel riders out there. Proterra Light i25 wheels feature an open-cavity profile to minimize weight and maximize efficiency as you get lost out where the pavement ends. Like all other Proterra wheels, the responsive 6-pawl freehub offers 5 degrees of reliable engagement whether you're crushing a gravel ride or have your frame bag bursting at the seams for an overnight adventure. Frequency Hub with top-tier EZO bearings 25mm TCS Tubeless compatible rims with 3-cross lacing and alloy nipples, hand-built in California Swift 6-pawl freehub and 5 degrees of engagement Solid rim strip and TCS tape included Specifications Rear Axle12mm Thru x 142mmRim Width (Internal)25Cassette Body TypeShimano/SRAM 11 Speed RoadCassette Body TypeShimano/SRAM 8, 9, 10 SpeedValvePrestaColorBlackWheel Size700cDefined ColorBlackISO Diameter622 / Road / 29"Tire TypeTubeless ReadyHub/Brake CompatibilityCenter-Lock Disc