A puncture-resistant, lightweight TPU tube for MTB and trail riding — built with a thicker wall than the Performance line for extra durability on demanding terrain. Made in Germany with a patented all-aluminum valve and a patented end-to-end welding process.
Perché funziona
MountainBike Magazin (10/2024): test result "very good". "In the group of super-light, fast-rolling tubes, a recommendation for weight-conscious people. The high-quality workmanship is striking."
Thicker wall for trail-grade durability. The GT uses a heavier-gauge TPU than the Performance off-road tube. Rock strikes, root impacts, sharp debris — the thicker wall handles the kind of forces mountain biking dishes out where a thinner tube might not survive.
85–87 g, depending on valve length. Well under half the weight of a standard butyl MTB tube (200 g+). The saving is rotational, so the effect on acceleration and handling is disproportionately large — you'll feel it on every climb and in every corner.
Stable at pressure. Less squirm than classic butyl tubes. Consistent performance throughout the ride, not just the first hour.
Patented all-aluminum valve with removable core. If the valve core ever works loose or leaks — 60 seconds and a valve tool to fix. No new tube needed.
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 small. Ideal as a spare. Fits a hip pack, frame bag, or jersey pocket without taking up the space a butyl tube would.
100% recyclable. When it finally wears out, it doesn't go to landfill.
Specifiche
|
|
| Size (ETRTO) |
622 × 40–65 mm (29" × 1.5–2.6") or 584 × 40–65 mm (27.5" × 1.5–2.6") |
| Materiale |
TPU (thermoplastic polyurethane), reinforced wall |
| Valve |
Presta, all-aluminum, removable core |
| Made in |
Germany |
| Recyclable |
100% |
Weight by valve length:
| Valve |
Weight |
| 40 mm |
85 g |
| 50 mm (with thread + nut) |
87 g |
| 70 mm |
87 g |
Which valve length do I need?
40 mm — covers most MTB rims with a shallow rim bed.
50 mm (with thread + nut) — useful when a rim has a deeper bed or when you want the nut to keep the valve from being pushed into the rim during high-pressure seating.
70 mm — deeper aero MTB rims and gravel-MTB crossover wheels. When in doubt, go longer.
Ideale per
- Trail, XC, and all-mountain riding where puncture resistance matters
- Riders who want tubeless-like weight savings without sealant maintenance
- Long rides, bikepacking, and remote trails where a flat really costs you
- Anyone who wants a compact, lightweight spare that's built with extra margin
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 tire 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 you hit full pressure, squeeze the sidewalls around the whole wheel to check the tube isn't peeking out anywhere.
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-aluminum 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.
