6-12 (6.00-12) Inner Tube – High-quality replacement inner tube for lawn tractors, trailers, golf carts, utility carts, zero-turn mowers, and sub-compact tractors. TR13 Straight Valve Stem – Durable rubber valve stem with offset design, compatible with standard wheels for easy installation. Multi-Fit Compatibility – Suitable for various small vehicles including ATVs, UTVs, golf carts, and utility carts thanks to flexible, durable butyl rubber. Radial & Bias Ply Tires – Designed to work with both 6R12 radial and 6.00R12 bias ply tires for versatile applications. Reliable Performance – Elastic and resilient butyl rubber construction provides consistent inflation, long-lasting durability, and smooth operation under load.