Renthal Twinring Heavy Duty Rear Sprocket - Red - 49T - 1540-520-49GPRD

Unique flat face design keeps weight to a minimum and means the TwinRing is as narrow as a regular chainwheel
Inner Ring is high strength Ultralight 7075 T6 Aluminum. Outer Ring is Electroless Nickel Coated steel
Outer is expanded at 200C and then fitted to inner, creating a permanent bond for the life of the sprocket
Precision CNC machined to extremely tight tolerances
Flat socket head screws add additional strength to the chainwheel during side impacts
Self-cleaning mud grooves between every tooth on both sides help prevent dirt build up