RK 420MRU U-ringchain +CL (Connect.link)

MRU series features RK�s only technology of Ultra Thin Seal, U-Rings, where the thickness of seal is less than 50% of the common seal, make it possible to design a Sealed Chain with the weight of a Non-Sealed Chain.
4 times longer chain life than non-sealed 420 chain.
Minimum maintenance needed, excellent total cost performance for business usage.
50-150cc