Part Number: OCT 01-3599108
SPRING RUBBER 1" TALL X 2 1/2" BLUE HARD 25LB

To get the most out of your set, one way is to use spring rubbers. Quality spring rubbers are made from polyurethane. Polyurethane offers uniform hardness and color coding helps to keep things organized. Spring rubbers will change spring rates, ride heights and wedge, provide for pit stop adjustability, and make for quick adjustments that will help to increase your corner speed.