MTD 490-321-0001 Steel Wheel-7X1.50 Bb Offset 750-Go 750-GO

What It Is

The MTD 490-321-0001 is a 7-inch diameter by 1.50-inch wide steel wheel with a ball bearing (BB) offset design, made for ride-on mowers, zero-turn mowers, and lawn tractors from MTD, Cub Cadet, Troy-Bilt, and other brands. It’s typically used as a front caster or rear drive wheel, depending on your machine’s configuration.

Fitment & Compatibility

Before buying, check these specifics:

• Axle size: This wheel uses a 3/4-inch ball bearing. Measure your axle diameter—if it’s 3/4 inch, it fits; if 5/8 inch or 1 inch, it won’t.
• Bolt pattern: It has a 4-bolt hub with a 4-inch center-to-center spacing. Confirm your wheel hub matches this pattern.
• Offset: The offset is designed for certain MTD decks and frames. Check your original wheel’s offset by comparing how far the mounting surface sits from the wheel’s centerline—this wheel pushes outward slightly.
• Machine compatibility: Fits many MTD, Cub Cadet, Troy-Bilt, Yard-Man, and Yard Machines models from the 1990s and later. Verify your model number against MTD’s parts lookup or the 490-321-0001 OEM cross-reference.
• Load rating: This is a light-to-medium duty wheel. For heavy commercial mowers, consider a heavier-rated option.

Key Things to Know

• Quality: Steel construction is durable for residential use, but the ball bearing can wear over time. Grease fittings are not included—add grease manually if bearings get dry.
• Installation: Easy—remove old wheel, slide on new one, and secure with a washer and cotter pin or bolt. No special tools needed.
• Gotcha: The “BB” means ball bearing, not “bushing.” If your original uses a bushing, this wheel may not mount securely without an adapter.
• Common issue: The offset can cause tire rubbing on tight-deck mowers. Measure clearance between the wheel and deck before buying.

Should You Buy It

Buy this wheel if you need a direct OEM replacement for an MTD or Cub Cadet lawn tractor or zero-turn mower with a 3/4-inch axle and 4-bolt pattern. It’s a solid, affordable choice for residential mowing, but skip it if you have a heavy commercial machine or need a non-offset wheel.