Arnold 490-322-0004 8X1.75 STL Offset Wheel

What It Is

The Arnold 490-322-0004 is a 8-inch diameter, 1.75-inch wide steel offset wheel designed as a replacement for lawn mower front or rear caster wheels, commonly found on riding mowers and zero-turn mowers. It’s a universal aftermarket part meant to replace worn or damaged OEM wheels on various brands.

Fitment & Compatibility

Before buying, verify three things:

• Axle hole size: This wheel has a 1/2-inch diameter axle hole. Measure your mower’s axle bolt or spindle to ensure it matches.
• Offset: The wheel is offset (the hub is not centered), which affects alignment. Check if your mower uses an offset or centered wheel—this one fits applications where the wheel sits slightly inward or outward.
• Brand/model: Fits many Craftsman, Husqvarna, MTD, Troy-Bilt, and Ariens models, but not all. Cross-reference your OEM part number (e.g., 490-322-0004 replaces some OEM wheels, but always compare dimensions). Common on older 38- to 54-inch deck riders.
• Tread type: Smooth tread; not for heavy mud or turf—best for flat, dry lawns.

Key Things to Know

• Quality: Steel construction with a rubber tire; durable for typical residential use, but the tire is not pneumatic (no air pressure to maintain). Expect a firm ride.
• Installation: Easy—remove old wheel, slide on new one, secure with existing cotter pin or washer. No special tools needed. Takes 10-15 minutes.
• Gotcha: The offset may cause the wheel to rub against the mower frame if your original wheel was centered. Test fit before tightening.
• Weight limit: Rated for up to 300 lbs per wheel—fine for most riders, but not for heavy-duty commercial mowers.

Should You Buy It

Buy this if you need a budget-friendly, direct-fit replacement for a worn 8-inch steel wheel on a residential riding mower and you’ve confirmed the 1/2-inch axle and offset design match your machine. Skip if you need a pneumatic tire for rough terrain or a centered wheel for a specific model.