Drive Belt GX20006 (1/2" x 89") uc30568 Replacement for John Deere D110 D120 D125 D130 D140 D155 D160 D170 L105 L108 L110 L111 L118 L120 L130 42" & 48" Deck Tractor Lawn Mower

What It Is

The Drive Belt GX20006 (1/2" x 89") is a replacement deck drive belt for select John Deere lawn tractors with 42" or 48" cutting decks. It transfers power from the engine pulley to the mower deck spindles, enabling blade rotation.

Fitment & Compatibility

• Exact measurement: 1/2" width x 89" length – verify your old belt measures the same (length is critical; 1/8" off can cause slip or binding).
• Compatible models: John Deere D110, D120, D125, D130, D140, D155, D160, D170, L105, L108, L110, L111, L118, L120, L130 – but only if equipped with a 42" or 48" deck (check your mower’s deck size stamp).
• OEM cross-reference: Replaces John Deere part numbers GX20006, UC30568, and AM141326. Aftermarket belt; not OEM, but matches specs.
• What to check before buying: Measure your old belt’s length and width. Confirm deck size (42" or 48") on the mower’s data tag. Ensure your mower doesn’t use a different belt for 54" or 60" decks.

Key Things to Know

• Quality: Good value for the price; users report 2–3 seasons of typical residential use. Not heavy-duty for commercial mowing.
• Installation difficulty: Moderate – requires removing the deck (or at least the belt cover) and routing around pulleys. A diagram is helpful (check your manual or online).
• Common gotcha: This belt is for the deck drive only, not the transmission/ground drive. Double-check you’re replacing the correct belt.
• Tension check: After installation, ensure the belt is properly tensioned – too loose causes slipping, too tight wears pulleys.

Should You Buy It

If you own a compatible John Deere with a 42" or 48" deck and need a budget-friendly, reliable replacement for residential mowing, this belt is a solid choice. It won’t match OEM durability for heavy commercial use, but for occasional lawn care, it’s a great value.