SET OF 4 BLACK 4.00-5 (300x100) SOLID BLOCK TREAD (GOOD CARE) MOBILITY SCOOTER TYRES Hi, you are looking at a SET of 4 Solid (Good Care) 4.00-5 (330×100) Puncher proof Black Diamond Tread Mobility Scooter Tyres. These are PU Infilled high quality 4 Ply rubber tyres, designed for mobility scooters with hub width 74mm or less.The infill is made from a slightly softer material than is usually used which makes them easier to fit and more comfortable in use. Please note on some scooters you may need to use two G clamps to press the two halves together, or use longer bolts if needed. Please see our other new mobility scooter parts. Thanks for looking!!!