Eclipse Performance Custom Tube — Narrow 16–32" × 23/35 mm Pro Road 70 mm — deeper carbon

70 mm — deeper carbon rims

A gravel tube built for long days on rough roads — with a thicker TPU wall than the Performance line for extra puncture protection where it matters most

Wider tubes have more material to distribute evenly — starting flat prevents bunching

all-aluminum Valve hole adapter Deep rim 50 mm Presta

Read the full installation manual

Eclipse Performance Custom Tube — Narrow 16–32" × 23/35 mm Pro Road 70 mm — deeper carbonMost inner tubes are made for standard wheel sizes. Bromptons, Birdy bikes, recumbents, tandem trailers, junior road bikes, and active wheelchairs aren't standard. This tube is. The Eclipse Performance Custom covers narrow profile tires across wheel diameters from 16 to 32 inches sizes that are either impossible to find in TPU elsewhere or only available in heavy butyl. Specify your exact tire diameter at checkout and we'll match it. Why it works From