Tube 4.00/5.10-18 TR-4 (110/100-18 or 120/90-18)
- "Real butyl tubes" made from 100% butyl polymer, unlike other "butyl" tubes, which are blended with butyl polymer and natural rubber
- Each tube is individually boxed with a full range of sizes and valve stem types clearly marked on each box end
- 100% butyl tube minimizes natural air leakage while maintaining air pressure for a longer period of time