MegaNorris Sandwich has two different compound layers; soft and hard. Hard layer sits right on the rim, preventing the hardest of impacts. Softer compound smooths the small impacts, working as an additional suspension member. The Sandwich is meant to be used on rough trails and enduro riding.Fits 28-34 mm internal rim widthsSold as SingleRide safely with an optimal tire pressure. Not too high or not too lowInstallation of MegaNorris is as simple as any tubeless setup, just slip the insert in before installing the second bead on the rim