GX20006 UC30568 Drive Belt for John Deere D110 D140 L130 Lawn Tractors - Replaces 88.9" Aramid Cord, Fits L120 LA135 D130 D170 S100 X107 and More

What It Is

This is a 88.9-inch aramid cord drive belt (replaces OEM UC30568) that transfers power from the engine pulley to the mower deck on John Deere lawn tractors. It’s designed for 42-inch and 48-inch cutting decks on select D, L, S, and X100 series models.

Fitment & Compatibility

Before buying, confirm your tractor’s model and deck size. This belt fits John Deere D110, D140, L130, L120, LA135, D130, D170, S100, X107, and several others—but not all deck widths. Measure your old belt length (should be 88.9 inches) and check the OEM part number (UC30568 or GX20006). Aftermarket belts can vary slightly in thickness or tension; compare the cross-section (typically 5/8 inch wide) with your original. If your deck uses a different belt routing or has a spring-loaded idler, verify the belt path matches the OEM diagram.

Key Things to Know

• Quality: Aramid cord is stronger than standard rubber, but aftermarket belts may wear faster than OEM. Expect 2-3 seasons with normal use.
• Installation: Moderate difficulty—requires removing the mower deck and routing the belt around pulleys, idlers, and the spindle. A belt routing diagram is essential; check online or in your manual.
• Common Gotchas: The belt can be tight to install; use a wrench to relieve tension on the idler pulley. If your tractor has a 48-inch deck, this belt may not fit—measure first. Also, some users report the belt squeals if not fully seated.
• Price vs OEM: At ~$16, this is a budget-friendly alternative to a $25-30 John Deere belt. Lower price may mean shorter lifespan.

Should You Buy It

If you own a compatible John Deere tractor with a 42-inch deck and need a quick, cheap replacement for light-duty mowing, this belt works. But if you have a larger deck, need maximum durability, or want a guaranteed fit, stick with the OEM UC30568 belt.