WTB Nano 40C Competition Wire Bead DNA Compound Clincher Knobby Bicycle Tire Gravel / Cyclocross / Dry to Damp/ Hardpack to Sand An elevated centerline reduces drag while also biting in while cornering. Long, staggered knobs provide steadfast traction without cutting down on speed. TCS tubeless reliabilty for gravel exploring or cyclocross racing. 570g Usage: Gravel / Cyclocross Conditions: Dry to Damp / Hardpack to Sand Casing: Durable Weight: 550 grams