STI BUTYL INNER TUBE 80/90-21 TR4 99-340

STI BUTYL INNER TUBE 80/90-21 TR4 99-340 {"features":"Butyl rubber tubes with heavy duty valves;Service life is up to 2-3 times that of natural rubber;Not for aggressive driving; may cause valve stem to pull away from tube;","description":"Made of a high-quality and highly-adhesive rubber compound which improves airtightness, can reduce the frequency of inflation and prolongs the service life of the tire.","descSource":"p"}