A puncture-resistant, lightweight TPU tube for MTB and trail riding. Made in Germany with a patented all-aluminum valve and a patented end-to-end welding process — two things that exist specifically to eliminate the failure points common in other TPU tubes.
Pourquoi ça marche
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."
59–65 g, depending on size and valve length. Roughly two-thirds lighter than a butyl MTB tube. Because the saving is rotational, the effect on acceleration, climbing, and steering precision is disproportionately large.
Real puncture resistance. TPU's high elongation absorbs trail debris in a way butyl can't. You stay rolling on rocks, roots, and the small sharp stuff that punctures conventional tubes.
Stable at pressure. Less squirm than classic butyl tubes. Consistent feel through long descents, not just the first kilometer.
Patented all-aluminum valve with removable core. If the core ever works loose or leaks, swap it in 60 seconds with a valve tool. No new tube needed. Compatible with standard extensions.
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 in a hip pack, frame bag, or jersey pocket without rearranging everything else.
100% recyclable. When it finally wears out, it doesn't go to landfill.
Caractéristiques
|
|
| Size (ETRTO) |
584 × 40–65 mm (27.5") or 622 × 40–65 mm (29") |
| Matériau |
TPU (thermoplastic polyurethane) |
| Valve |
Presta, all-aluminum, removable core |
| Made in |
Germany |
| Recyclable |
100% |
Weight by size and valve length:
| Valve |
Poids |
| 40 mm valve / 27.5" |
59 g |
| 40 mm valve / 29" |
62 g |
| 50 mm valve w/ thread+nut / 27.5" |
61 g |
| 50 mm valve w/ thread+nut / 29" |
64 g |
| 70 mm valve / 27.5" |
62 g |
| 70 mm valve / 29" |
65 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.
Idéal pour
- Trail, XC, and all-mountain riding where every gram of rotational weight counts
- 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 still performs
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.
