Built for consistent speed in a wide range of conditions, the Riddler provides extra oomph for the rider who prioritizes traction and efficiency in equal measure. The Riddler 37 will keep your legs going for hours and provide tenacious grip in the turns. Equally at home on the local CX course or gravel B-tracks, what else do you need?SG2 TIRESHIELD PROTECTION This tire is available with the all-new SG2 puncture protection, which is a lightweight nylon insert that provides bead-to-bead coverage and ensures that every area of the tire is protected against cuts and punctures. As competitions get rougher and cyclists pedal harder, the gravel gets tougher. It only makes sense that gravel tires get tougher, too.Nylon fibers have a flat profile, reducing the amount of rubber needed to fill the gaps between fibers and minimizing weight. Protected SG2 gravel tires have a 120 tpi carcass, which improves smoothness compared to a conventional 60 tpi tire.Dual DNA is the perfect blend of efficiency, traction and durability. The centerline tread features a firmer rubber compound for faster rolling and increased durability, while the side knobs are softer, slower-rebounding rubber that improves control and grip. - Wheel size: 28 inch - Delivery (quantity): single - E-bike compatibility: without manufacturer's recommendation - Features: light puncture protection - Intended use: Gravel - Weight: 481 g Tire - Tread: Fast Rolling - Tire size ETRTO in mm (width x diameter): 37-622 mm - Finish: black - Type: folding tire - Density carcass fabric: 120 TPI - Puncture protection - Rubber compound: Dual DNA - Pressure (bar): 2.07 - 3.79 - Pressure (psi): 30 - 55.