The flagship product of the brand

they allow the mousse to find traction where other mousses would not

When paired with compatible Edge cycling computers

especially those with dual exhaust

Bel Ray - Thumper Racing Synthetic 4T Engine Oil 10W-40 Size:1L The flagship product of theBel Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil is a 4 stroke motorcycle racing oil that combines the finest quality synthetic esters and highly refined mineral base oils specifically engineered for todays 4 stroke single cylinder, multi valve racing engines. Provides maximum anti wear protection for valve trains, rings, cylinders and pistons. Delivers maximum horsepower while providing consistent clutch performance. Meets API SN and JASO