100" x 1/2" Lawn Mower 42" Deck Belt for Cub Cadet XT1 LT42 XT2 LX42 754-05021 954-05021 Ariens 21546422 21547025 21547238 592855001 AYP 592855001 MTD 754-0181 173461SM 7014225YP 1736903

What It Is

This is a 100-inch long, 1/2-inch wide V-belt designed to drive the blades on 42-inch cutting decks for select Cub Cadet, Ariens, and MTD lawn tractors. It replaces OEM part numbers 754-05021, 954-05021, 21546422, 21547025, 21547238, 592855001, 754-0181, 173461SM, 7014225YP, and 1736903.

Fitment & Compatibility

Before buying, confirm your mower has a 42-inch deck and uses a 100-inch belt—measure your old belt end-to-end. This belt fits Cub Cadet XT1 LT42, XT2 LX42, and similar models with a 42-inch fabricated or stamped deck. Also compatible with Ariens 42-inch deck tractors using the OEM numbers listed, and MTD/AYP models (e.g., 592855001). Check your mower’s model number and deck size; if your deck is 46 or 50 inches, this belt won’t fit. Aftermarket belts like this one are often identical in function to OEM but cost less—just verify the length and width match.

Key Things to Know

• Quality: Polyester-cord construction; rated 4.3/5 stars (353 reviews). Holds up well for residential use, but heavy commercial mowing may shorten lifespan.
• Installation: Moderate difficulty. You’ll need to remove the belt guard, release the deck tension pulley, and route the belt per your deck diagram. Check your owner’s manual for the exact path.
• Common Gotchas: Ensure the belt is not twisted before tightening tension. If your mower has a separate deck drive belt (not the blade belt), make sure you’re replacing the right one. Also, verify that your deck uses a single 100-inch belt—some 42-inch decks use two shorter belts.
• OEM vs Aftermarket: This is a direct replacement for the listed OEM numbers; no adapters needed. Price is about 40% less than dealer OEM belts.

Should You Buy It

Buy this if you need a reliable, budget-friendly replacement for a worn or broken belt on a Cub Cadet XT1 LT42, XT2 LX42, or compatible 42-inch deck mower. It’s a solid choice for residential users who want to save money over OEM without sacrificing fit or performance.