Bogie Wheel Re-rubbering

[Paul Dutton]

Originally Posted by hrpearce

Alex 60D and 70D are hardness tests for rubber as tested with a durometer.

Rubber is measured in SHORE ratings. Standard O rings are 70 Shore and harder ones are 90 shore. 60 shore would be very soft, too soft in my opinion! Would 90 shore be too hard tho and cause premature breakup? Im a hydraulics engineer so I only understand seals...!!!