GX20072 Deck Belt Kevlar for John Deere 42 inch Deck Belt D105, D110, D130, E100, E130, L100, L110, L111, LA105, LA115, S100 Riding Mower with 42'' Deck - Aramid Cord, 1/2'' x 104''

What It Is

This is a 1/2-inch wide, 104-inch long Kevlar-reinforced deck belt designed to drive the blades on 42-inch cutting decks of select John Deere lawn tractors. It’s a direct replacement for worn OEM belts, built with aramid cord for higher strength and heat resistance than standard rubber belts.

Fitment & Compatibility

Before buying, verify three things: your mower has a 42-inch deck (measure deck shell width), and your model is on the list: D105, D110, D130, E100, E130, L100, L110, L111, LA105, LA115, S100. This belt replaces OEM part number GX20072 – check your owner’s manual or old belt for that number. It is not compatible with 46-inch or 54-inch decks, or with older John Deere models using a different belt length. Measure your existing belt’s length (end-to-end, flat) to confirm it’s 104 inches.

Key Things to Know

• Kevlar vs. standard belt: Kevlar cord resists stretching and snapping under heavy loads (e.g., tall grass, wet clippings), but it’s stiffer – expect a slightly tighter initial fit.
• Installation difficulty: Easy to moderate. You must release tension from the idler pulley, route around all three blade spindles and idlers, and re-tension. A belt diagram (often under the mower deck or in your manual) is essential – take a photo before removing the old belt.
• Common gotcha: The 1/2-inch width is standard, but some aftermarket decks use 3/8-inch belts. Verify width with a caliper or ruler. Also, this belt is not universal across all 42-inch decks – always cross-reference with your model number.
• No pulleys included: You may need to inspect and replace worn idler pulleys or spindles if the old belt failed from debris or bearing wear.

Should You Buy It

If you own one of the listed John Deere models with a 42-inch deck and want a durable upgrade over a standard rubber belt at a fair price, this is a solid choice. It’s best for homeowners who mow frequently or in tough conditions, but not for older tractors with non-standard deck sizes or those needing OEM-only parts for warranty.