• Fitment:That fit sizes 3.50-8 Tire Inner Tube,Fit Z50 Z50A（1968-1978) , Z50R(1979-1999) , Z50RD(1986) , MT50(1971-1973) , KV75(1976-1980 , MT1(1971-1975) mini trail bike,C300 Power Wheelchair and 4Front power wheelchair
• Good Air Retention:High Butyl rubber content adds better air retention to inner tubes to prevent air leakage. Butyl rubber inner tubes can hold air up to 6 months without leaking. Traditional rubber's air permeability means you often need to reinflate your inner tubes as often as every 30-45 days
• Better Performance:Butyl Rubber Better Shock Absorption Butyl adds to more stretch, shock absorption, impact and puncture resistance for a smoother ride.Our butyl rubber inner tubes are softer than ordinary rubber inner tubes of competitors. They offer better shock and vibration absorption performance for a much smoother ride
• Aggressive Off-Road Tread:Aggressive widely spaced blocky treads with large gaps between blocks allow for the tire to bite into lose soil, dirt, mud, grass better than smoother treads
• Package Include:2 pack 3.50-8 Tire Inner Tube;Rubber coated valve stem with enhanced seat seal prevents sand and dust from entering the inner tube and the tire. The tough rubber stem seat is also tear resistant to extend the service life of the valve