Lawn Mower Tractor GX20006 UC30568 Drive Belt for John Deere D110 D140 L120 L110 LA135 LA145 L130 D130 D170 LA115 D160 L111 L108 125 D125 115 155C L118 LA120 LA130 LA175 (1/2"x89")

What It Is

This is a 1/2-inch wide, 89-inch long drive belt for John Deere lawn tractors, connecting the engine pulley to the transmission and deck components. It’s designed for select D100, L100, and LA100 series models (e.g., D110, D140, L120, LA135) with 42-inch or 48-inch decks.

Fitment & Compatibility

• Measure your old belt: Confirm it’s exactly 1/2” wide and 89” long. A 1/2” x 89” belt fits these models only if the original is the same size.
• Check your deck size: This belt works with 42-inch or 48-inch decks. For 54-inch decks, you’ll need a longer belt (e.g., 1/2” x 96”).
• Model match: Compatible with John Deere D110, D140, D130, D170, D160, D125, L120, L110, L130, L111, L108, L118, LA135, LA145, LA115, LA120, LA130, LA175, 125, 115, 155C. Cross-references OEM part numbers GX20006 and UC30568.
• Aftermarket note: This is a non-OEM replacement. It may be slightly less durable than a genuine John Deere belt, but it’s a fraction of the cost.

Key Things to Know

• Quality varies: Some users report shorter lifespan (1-2 seasons) vs. OEM belts (3-4 seasons). Inspect for fraying after heavy use.
• Installation is moderate: You’ll need to remove the deck and release tension from the idler pulley. A belt diagram (often on the deck or in your manual) is essential.
• Watch for slipping: If the belt is too loose or the tensioner is worn, it may slip under load. Replace the tensioner spring if it’s stretched.
• No warranty issues: Using an aftermarket belt won’t void your mower’s warranty, but it may not meet OEM specs for heavy-duty mowing.

Should You Buy It

Buy this belt if you need a quick, budget-friendly replacement for a John Deere D100/LA100 series mower and don’t mind replacing it every 1-2 seasons. It’s a solid value for light-to-moderate residential use, but skip it if you mow rough terrain or large acreage—invest in an OEM belt for longer life.