OTR Grassmaster All Season 20X8.00-10 Lawn & Garden Tire

What It Is

The OTR Grassmaster All Season 20x8.00-10 is a 4-ply rated lawn and garden tire designed for zero-turn mowers, riding tractors, and lawn tractors. It’s meant for year-round use on turf, dirt, and light gravel, with a tread pattern that balances traction and turf protection.

Fitment & Compatibility

Before buying, confirm these measurements:

• Size: 20 inches tall, 8.00 inches wide, fits a 10-inch diameter rim. Check your current tire sidewall for these numbers.
• Rim width: This tire fits rims 6.5–7.0 inches wide. Measure your rim’s bead seat width if possible.
• Load capacity: 625 lbs per tire at 28 PSI. Ensure your mower’s axle weight doesn’t exceed this per tire (most residential mowers are fine).
• Brand/model fit: Works as a direct replacement on many John Deere, Cub Cadet, Husqvarna, Toro, and Craftsman models, but always verify OEM part numbers. Common OEM replacements include John Deere AM117564, AM117565, and Cub Cadet 734-3019.
• Tread pattern: All-season, not a dedicated turf tire. If you need minimal lawn marking, consider a smoother ribbed design.

Key Things to Know

• Quality concerns: With a 3.2/5 rating and only 7 reviews, this is a budget tire. Some users report uneven tread wear or sidewall bulges after a season.
• Installation difficulty: Moderate. You’ll need tire irons and a bead seater (or take it to a shop). Tube is recommended if your rim has a rusted or pitted bead seat.
• PSI range: 20–28 PSI. Lower pressure for turf, higher for hard surfaces. Overinflating reduces traction and ride comfort.
• Common gotcha: This tire is slightly wider (8.00 inches) than some OEM tires (e.g., 20x7.00-10). Check clearance against your mower deck and frame before buying.

Should You Buy It

Buy this tire if you need a cheap, basic replacement for a lawn tractor or zero-turn that sees mixed surfaces (lawn, dirt, gravel) and you’re willing to accept average durability and potentially shorter lifespan. Avoid it if you want a premium turf tire, need long-term reliability, or have a heavy commercial mower—spend more on a Carlisle or Kenda.