Magura rotors utilize a 2.0mm thickness for optimum performance SL (drilled): stainless steel construction with mud clearing curves and heat dissipating holes (used for Gustav-M, Louise and Julie models) SL (Marta): stainless steel construction with minimalist curve pattern (used for Marta and Marta-SL models) Venti: stainless steel drilled rotor with an aluminum ‘fan-profile’ center carrier for optimized cooling (MU-875*=red, MU-877*=black) Rotors include: (1) 6-bolt/44mmBCD rotor with (6) T-25 rotor mounting bolts or 35mm Centerlock version (lockring sold separately, use MU-8769) 127g SL (drilled), 106g SL (Marta), 167g Venti (6-bolt) @ 160mm (6.3″)

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