There are mainly two common forms of wheel steel rims: drop center rim and flat base rim; in addition, there are divided rims, semi-drop center rims, wide drop center rims, wide flat base rims and full tapered bead seat rims and so on.
1. Drop center rims
This rim as a whole wheel steel rim, whose central section is a deep groove, is mainly for cars and light off-road vehicles. This wheel steel rim has a flange with a shoulder to tire bead placement, the shoulder is usually slightly tilted to the center, which is generally 5 degrees angle l degrees. The largest diameter of sloping part is referred to the joint diameter between the tire and wheel steel rim bead. Deep groove into the middle section is easy to install or discharge the tire. This wheel steel rim with simple structure, stiffness, lower mass, is most suitable for the small size of tires with greater flexibility.
2. Flat base rims
There are many structural forms of the wheel steel rim. When installing the tire, first set the tires on the wheel steel rim, then put ring and push it inward until it crossed the ring groove on the wheel steel rim, and then open the lock ring embedded in the elastic ring slot.
3. Divided rims
This wheel steel rim consists of two parts:inner rim and outside rim. The inner and outside rim can be equivalent to the width of the wheel steel rim, and can also be varied. They are combined into one. Disassembly tires, you can remove the nut. Ring 3 is detachable. There was no ring, but by the wheel steel rim flange instead of ring made of one of the role of rhyme, the wheel steel rim and the web plate welded together.