RK MX U-ring racing chain features RK's new ultra slim UW-rings and is designed to deliver consistent power delivery as well as increased chain life.
It is also one of the lightest sealed ring motocross race chains available on the market, and all components are heat treated using RK's exclusive HIT (Heat Induction Transfer) process.
Please note that MXZ4 and MXZ5 connecting links are NOT interchangeable! You must use MXZ4 connecting links on MXZ4 chains and MXZ5 connecting links on MXZ5 chains.
