GX20072 Deck Belt 1/2" x 104" for John Deere D100 D105 D110 D125 D130 L100 L110 E100 E110 E120 E130 LA105 LA110 LA115 S100 GY20570 42in Riding Mower/Tractors Replace GY20570

What It Is

This is a 1/2" x 104" deck belt designed for 42-inch cutting decks on select John Deere riding mowers and tractors. It transfers power from the engine pulley to the spindle blades, enabling grass cutting.

Fitment & Compatibility

• Models: Fits John Deere D100, D105, D110, D125, D130, L100, L110, E100, E110, E120, E130, LA105, LA110, LA115, S100, and similar 42-inch deck tractors.
• OEM Cross: Replaces OEM part GY20570 (also listed as GX20072). Verify your original part number.
• Measurements: Belt is 1/2" wide and 104" long. Measure your old belt end-to-end (not looped) to confirm length. Deck must be 42 inches.
• Check: Ensure your mower has a 42-inch deck (measure blade tip to blade tip). This belt will not work on 38", 46", or 48" decks.

Key Things to Know

• Quality: Aftermarket belt; generally reliable for residential use but may not last as long as OEM under heavy duty cycles.
• Installation: Moderate difficulty—requires removing deck or routing belt around pulleys. Use a diagram (often under deck or in manual) to avoid misrouting.
• Common Gotcha: The belt is directional in some setups; check pulley grooves for wear before installing. A worn pulley can cause premature belt failure.
• Price: At $9.99, it’s a budget-friendly alternative to OEM belts (typically $20–$30). Read reviews for longevity feedback on your specific model.

Should You Buy It

Yes, if you need a cost-effective replacement for a 42-inch John Deere deck and your mower is used for light to moderate residential mowing. It’s a solid value for the price, but if you mow frequently on tough terrain or want maximum durability, consider spending more on an OEM belt.