The RK 520 EXW is a high-performance W-Ring sealed drive chain built for demanding off-road and MX use. Pre-stressed and pre-stretched for consistent load distribution and reduced maintenance, it handles high heat and big-bore power with confidence.
The RK 520 EXW Drive Chain is designed for riders who want dependable power transfer and long-lasting performance in harsh motocross and enduro conditions. Built from high-grade medium carbon alloy steel, every component is shot-peened and heat-treated to improve durability under impact loads, high speed, and extreme heat. Because it is pre-stressed and pre-stretched, the chain maintains more consistent load distribution and typically requires less frequent adjustment during use.
If you ride hard, deal with mud, sand, and frequent throttle changes, a sealed W-Ring chain helps keep critical lubrication where it belongs and reduces wear compared to non-sealed alternatives. The EXW series is also suitable for larger displacement off-road motorcycles, making it a strong choice for high-torque setups.
