The S-Tubo CX/Gravel is Tubolito's smallest and lightest gravel tube, weighing just 35g. It packs down small enough to disappear into a jersey pocket, which makes it a natural spare for tubeless gravel riders, and it rolls fast enough to use every day.

Highlights

• Smallest and lightest gravel tube in Tubolito's range
• 35g, 80% lighter than a conventional gravel tube
• Low rolling resistance
• Fits 700c and 650B tyres 32-50mm wide
• 42mm Presta valve, disc brakes only

The spare you'll forget you're carrying

At 35g and tiny when folded, the S-Tubo is Tubolito's answer to the spare tube that takes up half a saddle bag. Tubolito says its robustness is comparable to a standard butyl tube, so it's just as happy as your everyday tube.

TPU, not butyl

The S-Tubo is made from TPU, a high-tech plastic, using Tubolito's patented process. Tubolito tubes are TPU, so standard butyl patch kits won't bond to them. If you do puncture, repair it with Tubolito's own Tubo-Patch Kit.

Compatibility & fit

Fits 700c and 650B CX and gravel tyres 32-50mm wide. Tubolito states the S-Tubo CX/Gravel is suitable for disc brakes only, so don't use it on rim brake wheels. The valve is 42mm Presta; Tubolito's rule is that valve length minus rim height should be at least 15mm, so this length suits rims up to about 27mm deep. Fitting is available as a separate Tune Cycles workshop service and is not included.