GX20006 UC30568 Mower Drive Belt 1/2" x 89" 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 Tractor Mower, Aramid Cord.

What It Is

This is a 1/2" x 89" drive belt for the mower deck on select John Deere lawn tractors. It transfers engine power to the blades, and the aramid cord construction gives it higher strength and heat resistance than standard rubber belts.

Fitment & Compatibility

Before buying, confirm your mower deck size—this belt fits 42", 48", and 54" decks on the following models: John Deere 105, 115, 125, 135, 145, D110, D120, D125, D130, D140, D150, D155, D160, D170, L105, L107, L108, L110, L111, L118, L120, L130. It replaces OEM part #UC30568 (also GX20006). Measure your existing belt length (end-to-end, flat) to verify 89 inches; 1/2" width must match pulley grooves. Not compatible with zero-turn or older 300-series tractors.

Key Things to Know

• Quality: Aramid cord resists stretching and snapping better than Kevlar or standard rubber—good for heavy grass or frequent use.
• Installation: Moderate difficulty; you’ll need to remove the deck or at least the belt shield. Use a belt routing diagram (check your deck’s underside or manual) to avoid twists.
• Common gotchas: The 89" length must be exact—a 1/2" difference can cause slipping or poor blade engagement. Inspect pulleys for wear or debris before installing.
• Rating note: Only 2 reviews, so long-term durability isn’t widely confirmed, but aramid cord is a proven upgrade over budget belts.

Should You Buy It

If you own one of the listed John Deere models and need a reliable, affordable replacement for the original belt, this is a solid choice. The aramid cord offers better durability than basic rubber belts at a similar price, though with limited reviews, it’s best for users comfortable with DIY installation and checking fitment carefully.