KMC Chain Chain - 525EX Road chainFor off road application, chain should be promoted with upgraded steel alloy for all parts, subject to going through exclusive heat treating process as well, to remarkably reinforce its toughness against rugged terrain riding. KMC employs chromized pin and solid bushing into this chain to boost up its wear endurance and shock absorption to a great extent. Its outstanding performance does help inviting enjoyment and excitement to cyclist while going