RK Chain 520EXW86 520 Series 86-Link XW-Ring Off-Road ATV Chain

The RK Chain 520EXW is a super-premium 520-series XW-Ring drive chain engineered for extreme off-road and ATV performance. This 86-link version is produced at RK's Japanese factory and delivers industry-leading wear life and strength for demanding dirt, desert, and enduro applications.

XW-Ring Sealing Technology:

• Advanced XW-Ring seals made from Nitrile Butadiene composite with three contact lips and two convex outer stabilizers
• Triple barrier grease protection creates three lubrication pools to combat high-speed abrasion, extreme heat, and torsional flex
• Anti-debris technology helps prevent contaminants from entering the chain internals
• Compression and distortion-resistant seal design adds no O-ring drag or horsepower loss

Construction & Durability:

• High-carbon steel alloy components that are shot peened, heat treated, and pre-stretched
• Special thermal crack-resistant sideplates protect against thermal fatigue from rapid heat cycling
• Maximum wear life index of 1,000 — outlasting standard O-ring chains by 1.7x
• Maximum tensile strength: 8,500 lbs
• Rated for motorcycles and ATVs up to 750cc / 70HP

Specifications:

• Chain Series: 520
• Links: 86
• Pin-to-Pin Center: 15.875mm
• Links per Foot: 19.2
• Weight per 100 Links: 3.36 lbs
• Master Link Type: Clip (included)
• Maximum Wear Life Index: 1,000

Trusted by professional off-road racers and endorsed by championship teams across desert racing, GNCC, enduro, and ATV competition, the RK 520EXW is the go-to sealed chain for riders who refuse to compromise on durability and performance.