GX20006 1/2" X89"Drive Belt for John Deere Lawn Mower 105 115 125 135 145 D110 D120 D125 D130 D140 D150 D140 D150 D155 D160 D170 L105 L107

What It Is

The GX20006 is a 1/2-inch wide, 89-inch long drive belt for John Deere lawn tractors. It transfers power from the engine pulley to the mower deck, enabling blade engagement.

Fitment & Compatibility

Before buying, confirm your machine’s model and deck size. This belt fits John Deere 100-series (105, 115, 125, 135, 145) and D100-series (D110, D120, D125, D130, D140, D150, D155, D160, D170) tractors, plus L105 and L107 models. It is NOT compatible with 200-series or X-series machines. Measure your old belt length (89 inches) and width (1/2 inch). The OEM equivalent is John Deere part GX20006 (or GX20006A). Check your deck size—this belt works with 42-inch, 48-inch, and 54-inch decks common on these tractors. If your belt is longer or wider, this won’t fit.

Key Things to Buy

• Quality: This is an aftermarket belt; reviews average 3.8/5. Some users report shorter lifespan than OEM (1-2 seasons vs. 3-4). Inspect for fraying after heavy use.
• Installation: Moderate difficulty. You’ll need to remove the mower deck and route the belt around pulleys—check your model’s diagram. Expect 30-60 minutes. No special tools required.
• Common Gotchas: The belt may be slightly tighter than OEM on some decks; adjust tensioner accordingly. If your deck has a worn idler pulley, replace it simultaneously to avoid premature belt wear.
• Price vs. OEM: At $8.73, it’s roughly half the cost of a genuine John Deere belt. Acceptable for light-duty mowing (1-2 acres/week), but budget for annual replacement.

Should You Buy It

Buy this if you need a low-cost replacement for a John Deere 100/D100-series tractor with a 42-54-inch deck, and you’re comfortable with basic installation and potential shorter lifespan. Skip it if you mow large properties (3+ acres) weekly, want OEM durability, or need a belt for a non-listed model.