Rivet Type Connecting Link for RK 525ZXW Chains. Red Finish. RK's XW-Ring seals provides three contact lips and two lubrication pools to protect against dirt and debris, high-speed abrasion, heat buildup and the loss of lubricant under extreme conditions (That's a fancy way of saying XW-Ring seals make your chain last longer). Available in 520, 525 and 530 pitch and choose from either Gold, Black Scale, Chrome, Red, Blue or Green finish. 525ZXW XW-Ring Specs: Tensile Strength: 10,430 lbs, MAX CC Racing: 1,300cc, MAX Horsepower: 220 HP, Weight: 4.56 lbs, Max Chain Width: 23.5mm, Master Link Included: Rivet Type.