8TEN Deck Roller for John Deere 425 445 445 300 314 316 330 322 318 Lawn Tractors M115245

What It Is

This is an aftermarket deck roller replacement for select John Deere lawn tractors. It supports the mower deck to prevent scalping and improve cut quality on uneven terrain.

Fitment & Compatibility

• Fits these John Deere models: 425, 445, 300, 314, 316, 330, 322, 318 (check your specific deck model—not all 300-series decks use the same roller).
• OEM cross-reference: Replaces John Deere part number M115245. Verify your old roller’s part number matches.
• Measurements: Roller diameter is approximately 4 inches, with a 5/8-inch inner bearing hole. Measure your deck’s mounting bracket spacing and shaft diameter before ordering.
• Deck size: Common on 48-inch and 54-inch decks on these tractors, but always confirm your deck’s roller mount pattern.

Key Things to Know

• Quality: Solid aftermarket build—durable plastic roller with sealed bearings. Some users report slightly tighter fit than OEM, but it holds up well.
• Installation: Easy bolt-on replacement—no special tools needed. Remove the old roller’s retaining clip or bolt, slide off, and install the new one. Takes 10–15 minutes.
• Gotcha: The bearing may be pre-greased but not sealed as tightly as OEM—consider adding a dab of grease during install if you mow in wet conditions.
• Useful tip: Replace both deck rollers at the same time for even wear and consistent deck height.

Should You Buy It

If your John Deere 300- or 400-series tractor’s deck roller is worn, cracked, or squeaking, this is a budget-friendly fix that restores smooth rolling and prevents scalping. It’s a solid aftermarket alternative to OEM at a third of the price—just double-check your deck model and mounting measurements before ordering.