Challenge Gravel Grinder Pro TLR Clincher Tire - Options. Make your mark on the gravel scene with the Gravel Grinder. This tire combines a fast-rolling diamond center with aggressive shoulder knobs that only hook-up when the terrain gets soft, muddy, or a bit sketchy. This tire takes tubeless to a higher performance level by combining TLR's properties with a handmade construction for the ultimate in traction and ride quality. This tire includes PPS2, a combination of our sub-tread Puncture Protection System and an additional layer inside the casing to increase resistance to punctures. And, puncture protection is enhanced when combined with the appropriate tubeless sealant. Constructed with a 260TPI SuperPoly casing. Handmade - Handmade tires combine many attributes to create the most comfortable and lowest rolling resistance tires. TLR - TLR tires versions can be ridden tubeless with the addition of sealant but can also be run with an inner tube. - Handmade construction means maximum comfort. In this version, a bead-to-bead inner coating gives added puncture protection to these tubeless ready tires and greatly reduces gradual loss of air pressure. An aramid bead protection strip increases tire longevity and reduces rim chafing. Feature: activity: Bike usage bikesport: Road Bike, Cyclocross, Gravel, Allroad / Gravel Road wheel size: 700c tire type: Folding Tire, Tubeless Ready tire pressure: 2.2-3.7bar ETRTO: 38-622 carcass density: 260TPI/EPI tire compound: bead: aramid | casing: nylon weight: 370g All our products are professionally packed and shipped with tracking number and insurance. Lafo Bikes is offering you high end bikes, frames, parts & accessories that we love.  We are selling only genuine products, no copy or replica. Our goal is to offer you the best price on amazing bikes.