(2-Pack) TYK Industries 18X8.50-10 Lawn Mower Tire Inner Tube, Replacement 18.5X8.50-10 Tire Tube for Yard Tractors, Trailers with TR13 Short Rubber Valve Stems

What It Is

This is a two-pack of heavy-duty inner tubes designed to replace worn or punctured tubes in 18x8.50-10 lawn mower tires. They fit most riding mowers, zero-turn mowers, yard tractors, and small utility trailers using that tire size.

Fitment & Compatibility

Before buying, confirm your tire reads 18x8.50-10 or 18.5x8.50-10 on the sidewall. The tube fits both sizes. Check your valve stem type: these come with TR13 short rubber valve stems (about 1.5" long, 90-degree bend). If your wheel requires a straight or longer stem (e.g., TR15, TR218), you’ll need a different tube or an adapter. Measure rim diameter (10") and width (typically 6-8")—this tube works with standard 8.5" wide tires on 7-8" wide rims. Not for zero-turn mowers with tubeless-only rims (e.g., some Kubota Z-series) or pneumatic tires under 18" diameter.

Key Things to Know

• Quality: TYK tubes are butyl rubber—good puncture resistance, but not as thick as OEM or premium brands like Carlisle. Expect 2-3 seasons of moderate use.
• Installation: Moderate difficulty. You’ll need tire spoons, a bead breaker, and patience. Common gotcha: pinching the tube between the rim and tire bead during reassembly. Use baby powder or soapy water on the tube to reduce friction.
• Valve stem: The TR13 stem is short—if your wheel has deep center holes or a hubcap, the stem may not protrude enough to inflate easily. Check clearance before mounting.
• Two-pack value: At ~$19.50 per tube, it’s cheaper than buying singles. But if you only need one, you’ll have a spare.

Should You Buy It

Buy this if you have a standard riding mower or trailer with 18x8.50-10 tires, want a budget-friendly replacement, and don’t mind DIY installation. Skip it if you need heavy-duty tubes for commercial mowing, have unusual valve stem requirements, or prefer a thicker tube for rocky terrain—spend more on a Carlisle or Kenda tube instead.