Genuine, SM-RT75 rotor. Included as original equipment with Deore XT BR-M755 four-piston brake calipers. All-steel rotor. 6-Bolt hub compatible. 160mm size works with most front or rear calipers. 170mm size for use with some Manitou forks. Please measure the diameter of your current rotor to determine the diameter you need. 140g.
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