(2) Aggressive Tire Assemblies 20x10.00-8 Fits Grasshopper 618 Series 483921

What It Is

These are two 20x10.00-8 aggressive-tread tire assemblies designed for Grasshopper 618 Series mowers. The deep, lug-style tread provides superior traction on soft or uneven terrain—ideal for commercial mowing, slopes, or wet grass where standard turf tires slip.

Fitment & Compatibility

Before buying, measure your existing tire size: 20x10.00-8 (20-inch outer diameter, 10-inch width, 8-inch rim). Check your Grasshopper model—these fit the 618 Series (e.g., 618, 618T, 618K) and likely other Grasshoppers with the same tire spec, but confirm your OEM part number matches 483921. The assemblies include the tire mounted on a steel rim with a bearing hub—verify your axle spindle diameter (typically 3/4” or 5/8”) and bolt pattern (usually 4 on 4”). If your mower uses a different offset or hub pilot, these may not clear the deck or frame. Aftermarket replacements are common; compare with your existing wheel for lug nut thread size (likely 1/2”-20 or 5/8”-11).

Key Things to Know

• Tread aggressiveness: These lugs are deep and wide—excellent off-road grip, but they will mark up turf more than a standard lawn tire. Not for manicured lawns.
• Installation: Direct bolt-on for most Grasshopper 618 models, but you may need to reuse your old valve stem cap or add a tube if the rim has a pinched bead. No special tools beyond a lug wrench.
• Weight & balance: Assemblies are heavy; expect ~25 lbs each. They may require minor balancing if you notice vibration at high speed.
• Common gotcha: The 20-inch diameter can be slightly taller than OEM 20s—check deck clearance before mounting, especially with a 48” or 50” deck.

Should You Buy It

Buy these if you mow on rough, soft, or sloping ground and need maximum traction—e.g., commercial operators, hobby farmers, or anyone with wet, muddy conditions. Skip them if you’re after a smooth lawn finish or strictly mow flat, dry turf (they’ll chew up the grass). At $220 for a pair, they’re a solid value for heavy-duty use, but confirm fitment with your specific Grasshopper model before ordering.