Rolf prima aspin sl disc clincher rear road wheelusing the technology of the aspin sl combined with an xr road hubset the disc brake compatible aspin sl disc looks stealth with its us made disc brake all black rim featuresrim material alloy clincherfreehub material forged aluminiumwheel size 700cspoke count 24spoke type round racerim depth 23mmbrake track width external 22mmbrake track width internal 17mm hub xr roadfreehub compatible shimanosram 1011 speedbearings abec 3 chr