Penske Racing Shocks

Bump Rubber Cup, Carbon Fiber




This carbon fiber bump rubber cup is a great way to protect and enhance your bump rubbers performance. This cup is universal and will work with our standard 1/2″ or 5/8″ shafts. The carbon is easily modified and can be cut to fit short length rubbers if desired. The stock cup comes in 5″ over-all length. It is designed to fit nicely inside 2.5″ spring diameters so it can be run in coil over applications. The tough carbon fiber is durable and can withstand rocks and other debris that can damage and cause your bump rubbers to become inconsistent.

See the example graph above. This is one of our BR-47 (blue) bump rubbers run with and without the bump cup. You can see just at 1″ of displacement that you gain additional 50lbs just by capturing the bump rubber.

  • Fits 1/2″ or 5/8″ Shaft
  • Made of Carbon Fiber
  • Produces a More Consistent Bump Stop Curve
  • Protects Bump Stops For Longer Life
  • Works with Coil Over Applications
  • Easily Modified for Shorter Length Stops


Additional information

Weight 1 lbs
Dimensions 5 × 4 × 4 in


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