GX20072 Deck Belt 1/2'' x 104'' for John Deere D105, D110, D130, L110, L118, LA115, E100, S100, Replaces GX20072 John Deere 42 inch Deck Belt GX20570, UC32282

What It Is

This is a 1/2-inch wide by 104-inch long V-belt that drives the blades on 42-inch cutting decks for select John Deere lawn tractors. It replaces OEM part GX20072 (and superseded numbers GX20570, UC32282) for residential mowing.

Fitment & Compatibility

Before buying, verify your mower has a 42-inch deck (not 48-inch or 54-inch). This belt fits John Deere models: D105, D110, D130, L110, L118, LA115, E100, and S100. Also fits some older L-series and LA-series tractors with a 42-inch deck. Measure your old belt length—it must be exactly 104 inches (end-to-end, not around pulleys). Check the belt width: 1/2 inch (not 3/8 or 5/8). Cross-reference your mower’s model number against John Deere’s parts diagram—some late-model E100s may use a different belt. This aftermarket belt replaces OEM GX20072, GX20570, and UC32282.

Key Things to Know

• Quality: Most buyers report it matches OEM specs and lasts a full season under normal residential use. Some note slightly less rubber thickness than genuine JD belts, but acceptable for the price.
• Installation: Easy if you’ve done a deck belt before. You’ll need to remove the deck (or at least the belt shield) and release the idler pulley tension. No special tools required.
• Gotcha: Verify your deck has a spring-loaded idler—this belt is designed for that system. If your deck uses a manual tension arm, this belt may not fit correctly.
• Gotcha: The belt can be tight on first install. Use a wrench to pivot the idler arm fully—do not force the belt over pulleys.

Should You Buy It

Buy this if you have a 42-inch John Deere residential mower listed above and want a reliable, budget-friendly replacement for normal yard work. It’s not for heavy commercial use or decks over 42 inches, but for home mowing it offers solid value and easy installation.