A lightweight TPU tube built for the wider end of the road — all-road, endurance, and fast-rolling tyres from 25 to 45 mm on 700C wheels. It bridges our Performance Road (23–35 mm) and Performance Gravel (30–45 mm) tubes, so riders running rubber wider than a classic race tyre get one tube that fits. Made in Germany with a patented all-aluminium valve and a patented end-to-end welding process — the two things that make a TPU tube last.
Why it works
One tube covers 25–45 mm. Whether you run 28s on an endurance bike or 40 mm all-road tyres, the same tube fits — fewer spares to carry, one part to reorder.
Far lighter than butyl. With just 43g — a large weight saving over a standard butyl tube, right where it counts: rotating weight at the rim.
Holds pressure like it means it. TPU doesn't creep at pressure the way butyl does. Stable, consistent ride feel on long efforts — fewer top-ups, no gradual sag mid-ride.
Patented all-aluminium valve with removable core. If the core ever works loose or leaks, it's a 60-second fix with a valve tool — no new tube needed. Compatible with standard extensions for deep rims.
End-to-end welded, not spliced. Eclipse's patented welding process eliminates the seam junction — historically the most common failure point in TPU tubes. Backed by tight in-house QC before anything ships.
Packs to nothing. Smaller than a butyl spare. Fits any jersey pocket or saddle bag without rearranging everything else.
100% recyclable. When it finally wears out, it doesn't go to landfill.
Specs
| Size (ETRTO) |
622 × 25–45 mm |
| Material |
TPU (thermoplastic polyurethane) |
| Valve |
Presta, all-aluminium, removable core — 50 & 70 mm |
| Made in |
Germany |
| Recyclable |
100% |
Weight by valve length:
Which valve length do I need?
50 mm — standard and mid-depth rims (rim bed up to ~40 mm). Most endurance and all-road wheels.
70 mm — deep-section and aero rims, typically 45 mm and above. If your rim depth is close to a boundary, go longer — you can always use less, you can't add what isn't there.
Best for
- Endurance and all-road bikes running 28–45 mm tyres
- Riders who've gone wider for comfort and grip but don't want the weight penalty
- Anyone who wants one tube that fits a wide range — a simpler spare and a simpler shelf
- Switching from tubeless and wanting the weight benefit without the maintenance
Installing a TPU tube — the short version
TPU installs differently from butyl. Four things matter:
Start with zero air. Insert the valve completely flat — no pre-inflation. This is the single most common installation mistake.
No tyre levers on the second bead. Mount by hand. Levers pinch TPU in a way they don't pinch butyl.
Soft-inflate to 0.3 bar (5 psi) first. Before closing the second bead fully, give it a small amount of air to seat the tube without folds or twists.
Inflate in steps. Go up in 1 bar (14 psi) increments, not all at once. Before full pressure, squeeze the sidewalls around the whole wheel to check the tube isn't peeking out.
That's it. Once it's seated, it behaves like any other tube.
What makes Eclipse different
Eclipse pioneered TPU inner tubes in 2011 — before the category existed commercially. The patented all-aluminium valve and patented end-to-end welding process aren't marketing language; they're engineering decisions made to solve real failure modes. Every tube is QC-checked before it ships.
