- 8" wheel with 65A durometer urethane rubber tread material
- Body material: Black polycarbonate
- Coefficient of friction: 1.0 static (on tight pile carpet)
- Bore: 0.95'' diameter through hole
The 8" FIRST Rubber Treaded Wheel has a six holes (0.17 inch diameter) bolt pattern on a 1.875'' diameter bolt circle.