Sigma O-Ring Steel has the same strength and wear properties as XRG X-ring gold but with O-rings and without gold colouring.

• Tsubaki chain has perfectly cylindrical bushings and is pre-stretched for decreased initial elongation and increased wear life.
• Quality quad-staked riveting of the pin heads ensures maximum resistance to push out force.
• High viscosity grease is vacuum injected internally to dissipate heat and shock load.
• Super Seal O-rings surround shouldered and projected bushings to eliminate power robbing friction and seal dirt out.
• Sigma’s heavy duty construction gives it exceptional strength and wear resistance and has been tested and proven on race tracks all over the world.