Description
The Bridgestone TR4 Tube – 2.75B350-21 rounds out Bridgestone’s tube lineup for riders who want OE-grade fitment without OE pricing. Bridgestone built the TR4 as its do-it-all tube for spoked and multi-piece wheels, using a 3mm natural rubber wall that resists punctures and pinch flats on 2.75B350-21 fitments without the added cost of a race-spec compound most riders in this category do not need.
- Sized for 2.75B350-21 tire and rim fitment
- 3mm natural rubber wall for strong puncture and pinch-flat resistance
- Built for spoked and multi-piece wheel applications, front or rear
- TR-4 valve stem for reliable inflation and a secure, long-term seal
- Heavy-duty construction suited to trail, motocross, and street-legal dual-sport use
- A straightforward, no-surprises replacement for a worn or leaking factory tube
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. Whether this replaces a punctured original or fills out a spares box, the size and valve stem line up with the fitment printed on the tube itself.
