MFG Supply

8" Inner Tubes

8-355 - Tube 4.80X4.00X8 Straight Valve Stem
Tube 4.80X4.00X8 Straight Valve Stem
8-355
  • Manufacturer: Rotary
  • OEM Replacement Oregon 71-800, Prime Line 7-04802, Snapper/Kees 1-0525, Snapper/Kees 2153038, Snapper/Kees 2153038SM, Snapper/Kees 7010525, Stens 170-068, Sunbelt B1SB355
  • Size: 4.80X4.00X8
$7.95
8-358 - Tube 16X6.50X8 Straight Valve Stem
Tube 16X6.50X8 Straight Valve Stem
8-358
  • Manufacturer: Rotary
  • OEM Replacement Oregon 71-816, Prime Line 7-04803, Snapper/Kees 1-0525, Snapper/Kees 2153038SM, Snapper/Kees 7010525, Snapper/Kees 702153038, Stens 170-076, Sunbelt B1SB358
  • Size: 16X6.50X8/16X7.50X8
$10.14
8-898 - Tube 18X8.50 and 9.50X8 Straight Valve Stem
Tube 18X8.50 and 9.50X8 Straight Valve Stem
8-898
  • Manufacturer: Rotary
  • OEM Replacement Oregon 71-104, Prime Line 7-04806, Stens 170-084, Stens 170-085, Sunbelt B1SB898
  • Size: 18 x 850/950 x 8
$17.42
8" Inner Tubes for Go Karts & Mini Bikes

There are 2 methods used to measure tires:

1: If a "x" separates the 1st 2 sets of numbers the 1st number is the overall diameter of the tire. The 2nd number is the overall width. The last number represents the rim diameter.

2: Used for smaller and industrial tires. If a "/" separates the 1st 2 sets of numbers the 1st number is the overall width of the tire. The 2nd number identifies the section height. This is the measurement from the crown to the bead of the tire. The last number is the rim diameter. The overall diameter of the tire is D + D + C. So for a 4.10/3.50-4 tire the overall diameter is 11" (3.5 + 3.5 + 4).

Note that all measurements should be made when the tire is inflated to its recommended air pressure.