.top{margin-bottom:30px;}.top li{margin-left:5%;margin-right:5%;margin-top:10px;line-height:120%;list-style-position:outside;}Huck Norris MegaNorris Sandwich Protective Rim Insert - Tubeless 26 / 27.5 / 29" 60mm Fits 33-40 mm Single. 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.Ride safely with an optimal tire pressure. Not too high or not too low Installation of MegaNorris is as simple as any tubeless setup just slip the insert in before installing the second bead on the rim