BDELI Kevlar Lawn Mower Deck Belt Replacement GX20072 42" Deck John Deere D100 D105 D110 D120 D125 D130 E100 E110 E120 E130 L100 L107 L108 L110 L111 LA110 Riding Mower Replaces GY20570 1/2" X 104"

What It Is

This is a Kevlar-reinforced replacement deck belt for 42-inch cutting decks on select John Deere lawn tractors. It’s designed to drive the mower blades, replacing OEM part numbers GX20072 or GY20570.

Fitment & Compatibility

Before buying, confirm your mower uses a 42-inch deck (not 48 or 54). This belt fits John Deere D100, D105, D110, D120, D125, D130, E100, E110, E120, E130, L100, L107, L108, L110, L111, and LA110 models. Measure your existing belt: it must be 1/2 inch wide by 104 inches long (outside circumference). If your OEM belt is GX20072 or GY20570, this is a direct aftermarket replacement. Double-check your deck’s belt routing diagram—some models use a different belt if the deck has a different spindle configuration.

Key Things to Know

• Kevlar vs. standard rubber: Kevlar offers better heat and wear resistance, but this belt is still a budget aftermarket option—not OEM quality.
• Installation difficulty: Easy for most DIYers. You’ll need a socket set and possibly a belt tool to relieve tension. Expect 15–30 minutes.
• Common gotcha: The belt may be slightly stiffer than OEM, requiring extra effort to route around pulleys. Verify tension after a few minutes of run time.
• Price point: At $17.99, it’s about half the cost of a John Deere OEM belt. Good value if you don’t mind replacing it slightly more often.

Should You Buy It

If you own one of the listed John Deere 42-inch deck tractors and need a quick, affordable belt replacement, this is a solid choice. It’s not built for heavy commercial use, but for residential mowing it delivers decent durability at a fraction of OEM cost. Just confirm your deck size and belt length before ordering.