NYL : Nylon Bushing, SIB : Sintered Iron Bush, NRB-PC : Needle Roller Bearing Plastic Cage, NRB-MC : Needle Roller Bearing Metal Cage, PLASTIC CAGE:15.9 x 26.0 x 30, 19.0 x 34.5 x 35, 25.4 x 41.0 x 50.
The wheel consists of Solid Rubber Tyre clamped between two presses steel drums with nuts & bolts. Tyre is made from good quality rubber compound to ensure long life & good cushioning effect. The tyre, when worn out, can be replaced easily on sight.