1.Particular patent design of big flange, eliminating the hidden danger of bursting the tire.
2.Flange angle changes from vertical to round-radian, decreasing the friction, and lessening the generation of heat.
3.Bigger and thicker flange making your wheel resist more pressure.
4.Patent design of wider rim, relieving the pressure on tire.
5.Spinning technics making longer lifetime of disc than common punching technics.
By microscope, spinning technics making the atom structure of steel u...