Grant Rings for Your Vintage Triumph, Norton and BSA

USA made Grant Piston Rings from The Bonneville Shop for your vintage Triumph, Norton and BSA motorcycle. Buy online quality parts at The Bonneville Shop.

With over one hundred years of precision manufactured Cast-iron piston rings, members of Grant family have been building and racing cars for generations.

“Running their flathead 1932 Roadster at the dry lakes, the brothers (Grant and Dick MacCoon – nephews to founder Gerry Grant) gained knowledge in the fact that a piston ring was more than just decoration for a piston. They realized how important the ring was for sealing and helping to dissipate heat under tremendous cylinder pressure.”