In cycling democracy, the implacable proponents of both systems of footwear work side by side in an interesting symbiosis. The preferences of the milkmen are clear and their arguments overwhelming, yet they carry butyl in their jersey pockets for safety, which is useful where a puncture or a wick cannot save. On the other hand, classic and conservative cyclists in white trunks benefit from the undeniable advantages of inner tubes that won't stain their hands and clothing during installation. That's why we also offer WTB tubes to all groups of cyclists that are durable yet light enough to keep you moving on your bike or not feel like a weight in your jersey pocket. All tubes have a Presta valve. valve Type Size Width Valve Length Weight Presta 26 1.5/2.2 33mm TBD Presta 27.5 1.9/2.3 33mm TBD Presta 700 20/28 33mm TBD Presta 29 1.9/2.3 33mm 231g Presta 26 2.3/2.5 33mm TBD Presta 27.5+ 2.8/3.0 33mm 240g Presta 700 28/38 48mm 151g Presta 700 18/25 48mm 98g Presta 700 28/38 33mm 142g Presta 700 38/45 33mm TBD Presta 700 38/48 48mm 165g Presta 27.5 2.4/2.6 33mm 299g Presta 27.5 2.4/2.6 48mm 300g Presta 29 2.4/2.6 33mm 318g Presta 29 2.4/2.6 48mm 323g Presta 29 1.9/2.3 48mm TBD Presta 27.5/650 1.9/2.3 48mm 227g Presta 27.5+ 2.8/3.0 48mm TBD Presta 27.5/650 1.75/2.1 48mm 199g