Why choose SuperPro Bushes? Part 1: Knurling
Knurling is used on almost all of SuperPro's bushes to enable unrestricted pivoting of the polyurethane bush around the crush tube.
The knurling has two inherent design advantages:
- It reduces the surface area of polyurethane in contact with the crush tube. This reduction in surface area results in less frictional forces being developed making a very free-pivoting joint.
- The SuperPro knurl bore keeps their special lubricating grease intact for the life of the bushing, and eliminates the necessity for periodic re-greasing.
One of the many reasons you should fit SuperPro bushes over other brands.