GX20006 Mower Drive Belt 1/2"x 89" Fits l111 Tractor Replacement Belt d140 Transmission Drive Belt d130 Drive Belt l120

What It Is

The GX20006 is a 1/2-inch wide by 89-inch long V-belt designed as a transmission drive belt for select John Deere lawn tractors. It transfers power from the engine to the transmission, enabling forward and reverse movement on models like the L111, D130, D140, and L120.

Fitment & Compatibility

Before buying, verify these three things:

• Model & series: Fits John Deere L100, L110, L111, L120, D130, D140, D150, D155, D160, and D170 tractors. Does not fit X300 or X500 series.
• Belt dimensions: 1/2" width x 89" length. Measure your old belt—if it’s 1/2" x 88.5" or 89.5", this belt may still work, but length tolerance is tight. Use a tape measure, not a ruler.
• OEM cross-reference: Replaces John Deere parts GX20006, GX20007, GY20716, GY21153. Aftermarket belt—check if your tractor uses a factory belt with a different part number (e.g., M154678 for some models).

Do not buy if your tractor has a 5/8" wide belt or a longer/shorter belt (e.g., 92" for some D-series mowers).

Key Things to Know

• Quality: Aftermarket belt at a low price. Expect similar performance to OEM but may wear faster under heavy use or in dusty conditions.
• Installation: Requires removing the mower deck and routing around pulleys. No special tools needed, but a belt tensioner tool helps. Check your owner’s manual for the diagram.
• Common gotchas: The belt must be routed correctly—misrouting causes slipping or premature wear. Also, if your old belt broke, inspect pulleys for damage (bent, worn, or seized idlers) before installing the new one.
• Lifespan: With normal residential use (1-2 acres, occasional hills), expect 1-3 seasons. Frequent heavy loads or wet grass will shorten life.

Should You Buy It

Buy this belt if you have a compatible John Deere L100-series or D100-series lawn tractor and want a budget-friendly replacement for a worn or broken transmission drive belt. It’s fine for typical residential mowing, but if you mow commercially, on steep slopes, or want maximum durability, go with an OEM belt (about $25-30). For the price, it’s a solid value for DIY replacement.