19x7-8 Inner Tube 20x7-8 Tube 19x7.00-8 Inner Tube

What It Is

This is a rubber inner tube designed to replace a punctured or leaky tube inside a pneumatic lawn mower tire. It fits standard 19x7-8 and 20x7-8 tires (and the metric 19x7.00-8), commonly used on zero-turn mowers, riding tractors, and large walk-behind mowers.

Fitment & Compatibility

Before buying, verify three things:

• Tire size: Works with 19x7-8, 20x7-8, and 19x7.00-8 tires. Check the sidewall of your tire for these numbers.
• Valve stem type: This tube uses a standard TR13 (straight) valve stem. Ensure it matches your rim hole orientation (straight vs. angled).
• Rim width: Fits rims 5–7 inches wide. Measure your rim’s bead width if unsure—narrower or wider rims may cause tube bunching or pinching.

This is a generic aftermarket tube, not OEM for any specific brand (John Deere, Cub Cadet, etc.). It will fit as long as tire and rim dimensions match.

Key Things to Know

• Quality: Basic rubber tube—adequate for residential use. May be thinner than OEM tubes from premium brands like Carlisle or Kenda.
• Installation difficulty: Moderate. You’ll need tire irons or a bead breaker to remove/reinstall the tire. A dusting of talc powder inside the tire helps prevent tube pinching.
• Common gotcha: Over-inflation can cause the tube to bulge between the rim and tire bead. Stick to the tire sidewall’s recommended PSI (usually 12–15 PSI for turf tires).
• Valve stem alignment: The stem must sit straight in the rim hole. If bent during installation, it can leak or snap off.

Should You Buy It

This is a solid budget-friendly fix if you have a standard 19x7-8 or 20x7-8 tire on a residential mower and just need a quick replacement. Skip it if you want a heavy-duty tube for commercial use, need an angled valve stem, or have an oddball rim width—spend more on a brand-name tube for those cases.