M154958 M110311 Mower Drive Belt Replacement for John Deere 48" Deck 325 335 345 GT235 GT245 GX255 GX325 GX335 LX255 LX266-5/8" x 111 3/8"

What It Is

This is a replacement drive belt for John Deere lawn tractors with a 48-inch cutting deck. It transfers power from the engine pulley to the mower deck spindles, enabling blade rotation. Designed for residential and light-commercial mowing.

Fitment & Compatibility

Before buying, confirm your mower has a 48-inch deck and matches one of these models: 325, 335, 345, GT235, GT245, GX255, GX325, GX335, LX255, or LX266. Also verify the belt dimensions: 5/8-inch width and 111 3/8-inch length (OEM equivalent to M154958 and M110311). Measure your old belt’s length end-to-end (not looped) to double-check—slight variations can cause slipping or poor engagement. This is an aftermarket replacement; it may differ slightly from OEM in material or fit, but should work for standard residential use.

Key Things to Know

• Quality: Aftermarket belt; may wear faster than OEM under heavy use (e.g., thick grass, frequent mowing). Check reviews for durability reports on your specific model.
• Installation: Moderate difficulty. You’ll need to remove the deck and possibly a pulley guard. Refer to your mower’s manual for belt routing (often a diagram on the deck). A belt tension tool may be required.
• Common gotchas: Incorrect belt length (measure twice). Also ensure the deck spindles spin freely—stuck spindles can overheat and snap the belt quickly.
• Warranty: Typically 30-day return window; check seller policy before purchase.

Should You Buy It

This is a solid budget-friendly option if your OEM belt is worn or broken and you’re comfortable with a medium-difficulty DIY install. It’s best for homeowners with a single John Deere 48-inch deck model who want to save money over a dealer-purchased OEM belt. If you mow commercially or need maximum durability, consider spending more for an OEM or heavy-duty aftermarket belt.