Replacement Scooter Cart Tyre and Inner Tube (4.10 - 4 / 3.50 - 4 30psi) Specifications: 10" 250mm) Outer Diameter -- 3" (70mm) Tyre width -- Fits Standard 4" Rim (most common size) -- Schrader (basic automotive) inflation valve -- 35 PSi Maximum inflation -- Durable grip and versatile tread -- Not for highway use. Every pack contains: 1 x premium quality scooter cart tyre, 1 x inner tube with standard schrader (automotive) valve Durable grip and versatile tread - long life heavy duty nylon scooter, cart, sack trolley tyre Complete with premium quality inner tube with most popular schrader (automotive) valve Size: (4.10-4 / 3.50-4) - this size of tyre is the most commonly used and most widespread across the vast majority mowers, carts, trollys - so is highly likely to fit your needs Nylon Construction 30 PSi Maximum inflation