Shimano Altus M310 Rear Derailleur

The Shimano Altus M310 Rear Derailleur features advanced light-action shifting with friction-reducing Teflon-coated bushings and a long-cage design. Its oversized 13-tooth upper and 15-tooth lower pulleys deliver an impressive 43-tooth chain wrap capacity, outperforming conventional 11-tooth systems while reducing drivetrain friction. This innovative design creates seamless, quiet shifts that keep you focused on the ride!