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3/8" square socket drive
Type RV 4 fits sizes SM-MD
Tested and refined for decades
Vesrah seals are designed and manufactured through strict adherence to O
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RK 520XRU UW-Ring Chain - Gold (120L) S3-Colour-PEWTER 3/8" square socket drive520XRU was designed for professional MotoGP racing. Featuring UW Ring seals, XRU is a lightweight professional racing chain. The UW seals reduce friction while maintaining optimal horsepower delivery from the start of the race to the end. Developed in collaboration with MotoGP and World Superbike teams to produce the ultimate racing chain. Specifications: Tensi le Strength: 9,000 lbs (4082kg) MAX CC Rating: 1,000cc MAX Horsepower: 265 HP Weight: 3. 46
