Cane Creek Thudbuster G4 Elastomer Who You Gonna Call?If your ride is rough, on your mountain bike, who ya gonna call? Thudbuster! The Cane Creek Thudbuster G4 Elastomer is designed to work with the Cane Creek Thudbuster Seatpost. They are available in several firmness levels so you can dial in the perfect feel for your riding. Features Designed for the G4 Thudbuster Seatpost Available in several different firmness levels | Cane Creek | Thudbuster G4 Elastomer St Elastomer Capsule 70A