Eclipse Performance Off-Road Tube — 32" × 40/65 mm

32-inch wheels carry more load, cover more ground, and until now came with one unavoidable trade-off: a heavy inner tube. The Eclipse Performance Off-Road 32" is 69 g — up to 70% lighter than a butyl equivalent — built for cargo bikes, wide-tired adventure bikes, and plus-size setups where the wheel size is unusual but the weight penalty doesn't have to be. Made in Germany with a patented all-aluminum valve and a patented end-to-end welding process. Why it works MountainBIKE Magazin (10/2024): test result "sehr gut". "In the group of super-light, fast-rolling tubes, a recommendation for weight-conscious people. The high-quality workmanship is striking." 69 g for a 32" tube. A comparable butyl tube in this size weighs 160–180 g. That's over 100 g back on every wheel — 200 g across both — without changing anything else about your setup. Built for load and impact. The TPU compound resists punctures and cuts in the conditions 32" wheels actually live in: loaded cargo runs, rough city streets, mixed-surface touring with weight aboard. It flexes where butyl would stress. Holds pressure under load. TPU doesn't creep the way butyl does, so a loaded cargo or touring wheel keeps the pressure you set at the start of the day. Fewer top-ups, less rolling-resistance creep mid-ride. Patented all-aluminum valve with removable core. If the core ever works loose or leaks — 60 seconds and a valve tool to fix. No new tube needed. Compatible with standard extensions for deep-section 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 small for a tube this size. A spare 32" butyl tube is a brick. This one rolls down to fit a frame bag pocket — useful on tours where you can't easily get a replacement. 100% recyclable. When it finally wears out, it doesn't go to landfill. Specs Size (ETRTO) 686 × 40–65 mm Wheel size 32" (1.5–2.6") Material TPU (thermoplastic polyurethane) Valve Presta, all-aluminum, removable core Made in Germany Recyclable 100% Weight by valve length: Valve Weight 50 mm 69 g 70 mm 71 g Which valve length do I need? 50 mm — standard rim bed. Covers most cargo, touring, and adventure 32" wheels. 70 mm — deeper rims, or when you want more valve sticking up above the rim for easy pump attachment with a loaded bike. When in doubt, go longer — you can always use less, you can't add what isn't there. Best for Cargo bikes running 32" wheels where every kilo on the wheel costs you Wide-tired adventure and touring rigs in the 686 mm ETRTO standard Plus-size MTB and gravel setups using 32" wheels Riders replacing a punctured butyl spare who don't want to carry the same weight penalty twice 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.