Gravel bikes run different wheel sizes depending on the terrain and rider preference—700C for faster rolling on mixed surfaces, 650B for more cushion and tire clearance on rougher stuff. Tubolito's Tubo CX/Gravel-All covers both wheel diameters with a single tube, which simplifies inventory if you swap wheelsets or own multiple bikes. The TPU construction keeps weight down to 60 grams while handling tire widths from 32mm to 50mm, so it works whether you're running narrow cyclocross rubber or chunky gravel treads.

The material difference between TPU and butyl shows up in puncture resistance and weight. Tubolito claims twice the puncture resistance of standard butyl tubes, which matters when you're off pavement and dealing with thorns, sharp rocks, and debris that road riders rarely encounter. At roughly 60% lighter than a comparable butyl tube, you're saving rotational weight where it counts most. Air retention matches butyl, so you won't be checking pressure any more often than usual. The tube also handles leftover tubeless sealant inside tires without degradation—useful if you've converted from a tubeless setup or want to keep a TPU tube as backup for when sealant can't handle a larger puncture.

Tubolito offers the CX/Gravel-All with 42mm or 60mm Presta valves. Most gravel and cyclocross wheels don't run deep sections, so the 42mm option covers the majority of setups. If you do flat in the field, standard butyl patch kits won't work on TPU—the adhesive chemistry is different. You'll need Tubolito's Tubo-Patch Kit for repairs, so toss one in your bag alongside the tube. The compact packed size of TPU tubes means you can carry both without sacrificing space for tools or nutrition.