1/2" X89" Mower Drive Belt for John Deere GX20006 Lawn Tractor Transmission Drive Belt 105 107 108 115 125 135 145 155c D110 D120 D130 D140 D150 D160 D170 L105 L107 L108 L110 L111 L118 L120 L130

What It Is

This is a 1/2" wide by 89" long transmission drive belt for select John Deere lawn tractors. It transfers power from the engine to the transaxle, enabling forward and reverse movement—not the mower deck. It’s an aftermarket replacement for OEM part GX20006.

Fitment & Compatibility

• Check your model number: Fits GX20006-compatible tractors including 100-series (105, 107, 108, 115, 125, 135, 145, 155c) and 100-series L (L105, L107, L108, L110, L111, L118, L120, L130), plus D-series (D110, D120, D130, D140, D150, D160, D170).
• Measure your old belt: Confirm 1/2" width and 89" length. Some models may use a slightly different length—measure before ordering.
• OEM vs aftermarket: This is a generic replacement, not John Deere branded. It should work identically if dimensions match, but belt construction may differ.
• Deck size irrelevant: This is a transmission belt, not a deck belt. Deck size (42", 48", etc.) doesn’t matter for this part.

Key Things to Know

• Quality varies: At $9.99, it’s a budget option. Expect shorter lifespan than OEM belts, especially under heavy use or in hot conditions.
• Installation is moderate: You’ll need to remove the mower deck and possibly the belt guard. Have a wrench set and a belt routing diagram handy.
• Routing is critical: The belt must follow the correct pulley path—misrouting can cause slippage or damage. Check your tractor’s manual or look up the diagram online.
• Common gotcha: The 89" length is exact; if your old belt measures 88.5" or 89.5", this may run loose or tight. Measure carefully.

Should You Buy It

Buy this if you need a quick, low-cost replacement for a worn transmission belt and your tractor is one of the listed models. It’s fine for light-duty residential mowing, but if you mow large areas or want maximum durability, spend more on an OEM belt.