FR 571 Uncompromising Smash through rocks, slice over roots and show the trails who's boss. The FR 571 has everything it takes to conquer Val di Sole's "black snake" and sail over canyon gaps in the desert. Attack the trails on 29?? or 27.5?? wheels, depending on the rider's choice, for full-on attack mode, or run a bigger wheel at the front and a smaller one at the back to attack from the rear. No need to be delicate: the brass hex nuts included with the rim are tough enough to be abused again and again. Be bold and brash with a silver rim, or stay stealthy with the classic black version. Get yourself a FR 571 and show the trails who's boss.