Fast! The Nano 40c is built for speed, and let's just politely say it delivers. A 40mm, rounded profile and an elevated centerline provide enough volume for lower tire pressures and a smoother ride while still reducing drag and rolling resistance. This makes for an all out gravel destroyer that can still appease those clamoring for a truly big cyclocross tire. Winner? We think so. So does everybody else. Don´t believe us? Just ask. Everybody´s irrefutable favorite, ´nough said.Features- Minimal rolling resistance due to raised, consistent centerline tread.- Long, staggered knobs provide steadfast traction without cutting down on speed.- TCS Light/Fast Rolling versions of the Nano 40 tire provide ultimate tubeless reliability for gravel or cyclocross racing.- Race and Comp level tires are designed to provide optimal performance at a competitive weight, but must be used with inner tubes. Race and Comp level tires are not tubeless compatible.- Available with black or tan sidewalls.Usage: Gravel/CyclocrossConditions: Hardpack/Dirt/GravelWheel size: 700c Width: 40 Level: TCS Light/Fast RollingCompound: Dual DNAWeight: +- 545 gCasing: single-ply 120 tpiPuncture protection: SG2 About TSCWTB's proprietary sealant tubeless system, TCS (Tubeless Compatible System,) revolutionized rims and tires in 2009 when combining ETRTO, ISO, and UST standards with light tubeless rotational weights. Never before had a standards-based tubeless system weighed so little. Certified as the first sealant-based tires for the UST system in 2012 by Mavic, TCS continues to push the boundaries of what's possible through purpose-built tires and rims tailor-made for every discipline of cycling. Learn more about what's possible at wtb.com/tcsTCS light fast rolling (LFR) A fast and efficient centerline tread compound matched to sticky, low durometer side knobs coat a supple, gram-conscious casing designed to be compliant while still trail worthy. SG2 Puncture protectionMost sizes of this tire are available with our all-new SG2 Puncture Protection, which is a lightweight nylon insert that provides bead-to-bead coverage and ensures every area of the tire is defended against slashes and punctures. As events become progressively rougher and cyclists pedal farther, gravel gets tougher. It only makes sense for gravel tires to become tougher as well.- Nylon fibers have a flat profile, which reduces the amount of rubber needed to fill the gaps between fibers and minimizes weight.- Protected SG2 gravel tires feature a 120tpi casing, which improves suppleness compared to a traditional 60tpi tire.- SG2 was specifically designed to be a puncture protection layer, but it also improves air retention and eliminates seeping at the sidewall.DUAL DNA Rubber Compound Dual DNA is the perfect mix of efficiency, traction and durability. The centerline tread features a firmer rubber compound that boasts faster rolling and increased durability, while the side knobs are composed of softer, slower-rebounding rubber that improves control and grip.