Surly Extraterrestrial 29 x 2. 5 Tubeless Tire The Surly Extra Terrestrial 700C Tubeless Tire features low rolling resistance, tread and sidewall flat protection and great traction on hardpacked trails. The large and flat directional tread pattern allows for ultra-low rolling resistance, making for a tire that likes to go fast on dirt. The ET uses a nylon breaker in the sidewalls for cut protection, a molded pattern on the sidewall for anti-cut propagation, and a Kevlar cap under the tread to protect against flats. The Surly Extra Terrestrial 700 Tubeless Tire is a great all-around tire and is truly out of this world. Features Moderately spaced, large, flat block tread design Rolls fast and smooth. Tread and sidewall flat protection Available in slate wall 60 TPI SPECIFICATIONSSize29" x 2. 5"29" x 2. 5"Bead Folding Folding TPI6060Compound-Protection Tread and sidewall Tread and sidewall Tubeless Compatible Yes Yes Intended Use Touring, gravel Touring, gravel Approximate Weight1040g (Regular)1070g (slate wall) | Surly | Extraterrestrial 29 X 2. 5 Tubeless Tire | Black | 60Tpi, 29 X 2. 5, Tubeless, Folding | Nylon