415HRU U-Ring
HRU 415 Sprint Racing Chain Series Features RK’s proprietary Ultra Thin U Seal Rings. U-Rings have a seal thickness less than 50% of the common O-ring seal, making it possible to design a Sealed Chain with the weight of a Non-Sealed Chain.
Running a Sealed Chain on race machines can minimize the elongation of the chain, keeping high horsepower transmission efficiency throughout the duration of the race.
Yamaha
- Y15ZR, LC135
Honda
- RS150
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