PARTS UNLIMITED Inner Tube - Standard - 18" - TR-4 B20061

If you're tired of losing tire pressure between rides or races, a genuine butyl inner tube is non-negotiable. PARTS UNLIMITED's 100% butyl construction—not a butyl blend—delivers superior air retention, meaning your pressures stay consistent lap after lap. That reliability translates directly to predictable handling and less frequent top-ups, whether you're at the track or on the trail.

Unlike cheaper "butyl" tubes that mix butyl polymer with natural rubber, this tube uses pure butyl throughout, dramatically reducing natural air permeation. You'll spend less time fussing with a pump and more time focusing on performance. For riders and racers who demand dependable equipment, this is the baseline standard.

• 18" diameter wheel
• TR-4 valve stem
• 100% butyl polymer
• Superior air retention
• Individually boxed
• Standard sizing
• MPN: 0350-0341