1.Zero rotation clearance ,applicable to positive and negative rotation.

 2.Resistant to oil,dirt ,sand ,grease ,moisture,many solvents,as well as the atmospheric effects of ozone.

 3.Urethane spiders provide high abration resistance and elasticity ,along with good damping characteristics and compensate radial ,angular and axial deviations.

 4.Detachable design ,easy installation.

 5.Fastening method of camping screw.

 6.The main part is made of high strength aluminium alloy.