BlueStars GX20006 UC30568 Mower Drive Belt - for John Deere 105 115 125 135 145 D110 D120 D125 D130 D140 D150 D155 D160 D170 L105 L107 L108 L110 L111 L118 L120 L130 Lawn Mower | Aramid Cord | 89 in

What It Is

The BlueStars GX20006 UC30568 is an aftermarket 89-inch mower drive belt designed to transfer power from the engine pulley to the blade spindles on select John Deere lawn tractors. It’s built with aramid cord reinforcement for higher tensile strength than standard rubber belts, targeting residential mowing on flat to moderate terrain.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: This belt fits 42-inch and 48-inch decks on the listed models (e.g., D110, D130, L120). It will NOT fit 54-inch decks.
• Model variant: Works with John Deere 100 Series (105–170), D100 Series (D110–D170), and L Series (L105–L130) built from the mid-2000s onward. Avoid older L100 models (pre-2005) with different belt routing.
• Measurements: 89 inches long, 1/2 inch wide. Measure your old belt’s length and width; if yours is 90 inches or 5/8 inch wide, this belt won’t work. Cross-reference OEM part numbers GX20006, UC30568, or AM136671.

Key Things to Buy

• Aramid cord vs. standard: Aramid (like Kevlar) handles heat and tension better than cotton or polyester cords. Expect longer life than cheap rubber belts, but not as durable as OEM Kevlar belts.
• Installation difficulty: Moderate. You’ll need to remove the deck, release the belt tensioner with a wrench, and route the belt around pulleys per your deck diagram. Expect 30–60 minutes for first-timers.
• Tension check: After installing, ensure the belt is snug but not tight—too loose causes slipping, too tight wears pulleys. Re-check tension after the first 15 minutes of use.
• Common gotcha: The belt may appear slightly shorter than the old one when cold. It will stretch slightly after a few hours. If it won’t fit at all, double-check your deck size and belt routing.

Should You Buy It

If you need a reliable, affordable replacement for a worn drive belt on a common John Deere 42-inch or 48-inch deck tractor, this is a solid choice. It’s not a heavy-duty commercial belt, but for weekly residential mowing, the aramid cord gives good value over cheap alternatives. Skip it if you have a 54-inch deck, an older pre-2005 model, or if you need a belt for extreme slopes or daily commercial use—go with OEM or a heavier aftermarket option.