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:

  1. 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.
  2. 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.

Monday 30 January — Jon Nicholson

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