2PCS 20x8.00-8 Rear Tire and Wheel Assemblies, 3/4" Borehole, 3.5" Offset Hub and 3/16" Keyway, 4 Ply, 905lbs Capacity, Replacement for Riding Lawn Mowers

What It Is

This is a pair of 20x8.00-8 rear tires mounted on steel wheels with a 3/4" bore, 3.5" offset hub, and 3/16" keyway. Designed for riding lawn mowers and garden tractors, these assemblies handle up to 905 lbs per pair and are a direct replacement for worn or damaged rear tires.

Fitment & Compatibility

Before buying, verify these three measurements:

• Bore size: Must be 3/4" (most common for riding mowers). If your axle is 5/8" or 1", these won’t fit.
• Hub offset: 3.5" offset means the wheel center is offset 3.5" from the mounting face. Measure your current wheel’s offset (distance from mounting plate to wheel center). A mismatch can cause tire rub on the frame or deck.
• Keyway: 3/16" keyway requires a matching key (sold separately). Check your axle has a key slot and that the key size matches.
• Tire size: 20x8.00-8 fits most mowers with 20" rear tires (common on 42"-54" deck models). Measure your old tire’s diameter and width—don’t assume from deck size.
• Lug pattern: These are 4-bolt hubs (4 on 4" pattern). Count your bolts and measure center-to-center across opposite bolts. If you have a different pattern (e.g., 5-bolt), these won’t work.
• Brand/model: Fits many brands (Cub Cadet, John Deere, Husqvarna, Craftsman, etc.), but always cross-reference your OEM part number (e.g., 590-06296, 170-108-100). Aftermarket replacements may vary slightly in offset.

Key Things to Know

• Load capacity: 905 lbs total (452.5 lbs per tire) is sufficient for most residential riding mowers but marginal for heavy zero-turn models. Check your mower’s weight plus operator.
• Installation: Moderate difficulty—requires jacking, removing old lug nuts, and aligning keyway. You’ll need a 3/16" key (not included) and a torque wrench (lug nuts to 50-65 ft-lbs). Tire is pre-mounted and inflated.
• 4-ply rating: Good for typical lawn use, but not for rough terrain or heavy loads. Expect decent tread life (2-3 seasons) on flat ground.
• Offset gotcha: The 3.5" offset is common for many riders, but some older or compact models use 3" or 4". Measure twice—returning large tires is costly.

Should You Buy It

Buy this if you need a direct-fit, affordable replacement for a riding mower with 20x8.00-8 rear tires, 3/4" axle, and 4-bolt pattern. It’s a solid value for residential mowing, but skip it if your offset differs, you have a zero-turn with higher load requirements, or you need a 5-bolt pattern.