RK EXCEL GB428MXU DRIVE CHAIN GOLD 428 X 130

Electric bikes hit the chain with full torque from the first twist of the throttle, and that kind of load is hard on a drivetrain. The RK GB428MXU is a sealed, gold-finish 428 chain built to stand up to it, with the thin seals e-moto frames need and the protection that keeps it running longer.

Why the MXU Is Different

• Ultra-thin UW-Ring seals, about 50% thinner than a standard O-ring, which suits frames with tight chain clearance
• Triple-barrier grease protection plus anti-debris technology to keep grit out of the internal components and reduce chain wear
• Small seal contact points that cut cold-start drag
• RK says the sealed design delivers up to triple the life of a non-sealed chain
• Gold finish that looks as good as it holds up

Specifications