TPU Gravel Tube

What Our Gearhead® Experts Are Saying:

"I spec these into gravel race builds when rotational weight and puncture confidence both matter. The TPU construction comes in at 47g for the 700 x 35-50c size, which is a serious reduction from butyl, and the thorn resistance improvement gives riders real peace of mind on long stages over unpredictable surfaces. The removable valve core is a practical detail that makes pressure management and trailside service straightforward at any stop."

Gravel racing asks a lot of a wheel. The surfaces change constantly, debris is unavoidable on long stages, and every gram of rotating weight is felt through the accelerations, punchy climbs, and extended efforts that decide results. At 47g, the Specialized TPU Gravel Tube for 700 x 35c tires is one of the most impactful internal upgrades available for a gravel build running fuller-volume rubber, delivering weight savings and performance improvements that show up in the data and in how the bike actually feels underway.

Thermoplastic polyurethane sets this tube apart from butyl in every metric that matters for gravel. Rolling resistance comes in 5% lower than Specialized's own Turbo Tube baseline, a gain that compounds significantly across the distance of a full gravel event or a loaded bikepacking day. Thorn resistance is 70% higher, which, on routes that cross farmland, forest tracks, or unmaintained roads, is not a marginal benefit but a genuine reliability advantage. The 35-50c size range makes this tube the right choice for riders running wider tires optimized for traction, comfort, and control on the roughest surfaces a gravel route can offer. The alloy Presta valve stem is engineered for durability with a removable core that accepts standard valve tools and is fully compatible with sealant injection for riders who want the added insurance of a tubeless-style setup inside a traditional tube format.

The 65mm valve length is the right specification for modern gravel rims with moderate to deeper profiles, eliminating the pump head clearance issues that shorter valves create on those builds. Full rim and disc brake compatibility means this tube drops into any contemporary gravel wheelset without concerns. For riders building a focused gravel race setup or a high-performance bikepacking rig around wider tire clearances, the Specialized TPU Gravel Tube is the internal specification that brings measurable rotational weight savings and meaningful puncture confidence to every kilometer of uncertain terrain.