RK 420 MXU2 U-Ring Sealed Chain

RK 420 MXU2 U-Ring Sealed Chain

When conditions turn muddy, sandy, or wet, or riders need a long-lasting racing chain, RK answers with the MXU sealed chain for supercross, motocross, and off-road use. The RK 520MXU uses ultra-thin UW seals for bikes with narrow clearance and delivers triple the service life of a non-sealed chain. The 420MXU and 428MXU use RK's U-Seal for added durability without added drag. RK's U and UW seals use triple-barrier grease protection and anti-debris technology to reduce friction between internal components and extend wear life. Small contact points also help reduce cold-start drag. U and UW ring thickness is 50% thinner than a standard O-ring while delivering longer service life. MXU is available in 420, 428, and 520 pitch. At just 3.04 pounds per 100 links, the GB520MXU Sealed Motocross Chain is the lightest sealed off-road chain on the market.

Features:

• Designed for supercross, motocross and off-road racing in muddy, sandy and wet conditions
• Sealed design helps extend chain life compared to non-sealed chains
• 420/428 models feature RK U-Seals for increased durability with minimal added drag
• 520 models feature ultra-thin UW-Ring seals for narrow-clearance applications
• Triple-barrier grease protection and anti-debris technology reduce internal wear
• Thin U/UW-Ring seals reduce contact points and cold-start drag
• U/UW-Ring seals are 50% thinner than conventional O-rings
• Available in 420, 428 and 520 chain pitches
• GB520MXU weighs just 3.04 lbs per 100 links, making it an exceptionally lightweight sealed off-road chain

Specifications:

• Tensile Strength: 4,540 lbs
• Max CC Rating: 150cc Off-road
• Max Horsepower: 35HP
• Weight: 1.74 lbs
• Max Chain Width: 17.1mm
• Master Link Included: Clip type