Description
When a knobby tire meets a rock garden at speed, the inner tube is doing quiet work most riders never think about – the Bridgestone MXUH Tube – 80/100-21 is one built to handle it. Bridgestone builds the MXUH as the top tier of its motocross tube range, a lightweight companion meant to sit behind 80/100-21 rubber without adding unnecessary rotating mass to the wheel. It is aimed at riders who push tire pressure, casing flex, and landing impacts harder than the average trail rider does.
- Sized specifically for 80/100-21 motocross tire fitment on spoked wheels
- Butyl rubber compound formulated to resist heat buildup and repeated flexing on the track
- Wall thickness tuned for pinch-flat resistance during hard landings and rock strikes
- Correct valve stem type (TR-4) for straightforward mounting and reliable inflation
- Consistent wall gauge to help maintain even tire pressure lap after lap
- Backed by Bridgestone’s long-running motocross tube engineering and quality control
Bridgestone tubes are manufactured to a consistent wall thickness and a specified valve stem type, which matters more than most riders realize once a tube has a few seasons of heat cycling and constant flex behind it. A tube that runs thin in spots or drifts off the printed size will wrinkle inside the tire casing, chafe against the rim, and eventually let go at the worst possible time on the trail or track. It is a straightforward, no-frills replacement, so double-check the tire’s marked size before mounting to avoid a return trip to the shop for an exchange.
