Tire Inner Tube 350X400X7 3.50X4.00X7 3.50 x 4.00-7 for Honda Tiller Tube 350X400X7 Straight Stem. Tube 350X400X7 Straight Stem. Fits Honda Tillers. TIRE SIZE: 350X400X7. VALVE STEM: STRAIGHT. Steel Bushing Axle Spacer 1" OD X 5/8" ID X 5" Length Mini Bike Go Kart.