PARTS UNLIMITED Inner Tube - Standard - 4.00-12 - TR-87 B20014

Air pressure retention is critical for consistent tire performance, whether you're running track days or managing a fleet of vehicles. PARTS UNLIMITED's 100% butyl inner tubes eliminate the slow air bleed that plagues standard tubes, keeping your tires at optimal pressure longer and reducing maintenance intervals. This isn't a blend—it's pure butyl polymer construction designed to minimize natural air leakage without compromise.

Each tube ships individually boxed with clear size and valve stem markings, making inventory management and installation straightforward. Whether you're replacing a punctured tube or stocking spares, you'll know exactly what you're getting.

• Size: 4.00-12
• Valve stem: TR-87
• Material: 100% butyl polymer
• Construction: Real butyl (not blended)
• Air retention: Extended pressure hold
• Packaging: Individual box per tube
• Markings: Size and valve type labeled
• MPN: 0350-0319
• Fitment: Standard