2.700C Six hole QR Disc brake (use Six hole disc rotor,Front wheel 9x100mm, Rear wheel 9x135mm). The disc brakes has 24 holes on the front wheel and 24 holes on the rear wheel.120 rings. 3.700C Centerlock QR Disc brake (use Centerlock disc rotor,Front wheel 9x100mm, Rear wheel 9x135mm).
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