A lightweight TPU off-road tube for junior MTB and youth bikes in 20" and 24". Made in Germany with a patented all-aluminum valve and a patented end-to-end welding process.
Perché funziona
32–38 g. A fraction of the weight of a butyl junior MTB tube. Because young riders feel rotational weight even more than adults — they have less torque to push it — the upgrade is felt on every climb, every gate, and every spin-up.
Real puncture resistance. TPU's high elongation handles roots, rocks, and curb hits better than butyl. Fewer rides cut short, fewer roadside repairs.
Patented all-aluminum valve with removable core. If the core ever works loose, swap it in 60 seconds with a valve tool. 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.
Packs to nothing. Easy to slip a spare into a hip pack or backpack so the kid can keep riding when something goes sideways.
100% recyclable. When it finally wears out, it doesn't go to landfill — a good thing to teach early.
Specifiche
|
|
| Size (ETRTO) |
406 × 40–65 mm (20" × 1.5–2.6") or 507 × 40–65 mm (24" × 1.5–2.6") |
| Valve |
40 mm Presta, all-aluminum, removable core |
| Materiale |
TPU (thermoplastic polyurethane) |
| Made in |
Germany |
| Recyclable |
100% |
Weight by wheel size:
| Valve |
Weight |
| 20" (406 mm) |
32 g |
| 24" (507 mm) |
38 g |
Which size fits my bike?
20" (ETRTO 406) — most 20" junior MTB and kids' off-road bikes.
24" (ETRTO 507) — junior MTB, youth dirt-jump, and progression-level kids' bikes.
Ideale per
- Junior and youth riders moving up the wheel sizes who want a real upgrade
- Parents tired of repairing punctured kid tubes mid-ride
- Race-day setups for kids' XC and gravity disciplines
- Anyone who wants the kid's bike to feel noticeably better, not just look better
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.
