Shimano XTR SM-MA90-F180P/P Disc brake adapter for Post Mount caliper, Post Mount fork, 180mm rotor

Lighter, XTR-grade caliper adapters
Includes conical washer for better caliper alignment
Works with all post mount calipers
Legend : SM-MA90-F203S/P :
Position :
F: Front
R: Rear
203 : Rotor size
Caliper type:
S: Int-A-standard
P: Post
Suspension/frame type:
S: Int-A-standard
P: Post
B: Boxxer
Z: Marzocchi 20mm