Completely silent and efficient, this MRP SXg SL2 lower guide for use with Norco Range 2021 is easily setup for zero rubbing and, with no moving parts, introduce zero drag into your drivetrain. ONLY compatible with Norco Range (2021 ). Works with 32-36t round rings (and 30-34t oval rings). Provides bash protection and chain security. Lower guide features TPU co-molding to silence chain contact. Item Specifications: Color: Black, Weight: 99, Chainguide Mount Type: ISCG-05, Material: Aluminum, Material: Composite, Defined Color: Black, Max Tooth (teeth): 36,