42-inch Deck Belt 954-05021/1/2" x 99.75" -Compatible with MTD Cub Ct Craftsman 754-05021 XT1 XT2 LT42 LT42 EFI, LT42 KH, LX42 KH, LX42 KW, LX42, LX42 EFI T8000 T7800 T210 TB1942

What It Is

This is a 42-inch deck drive belt (1/2" x 99.75") for MTD-built lawn tractors like Cub Cadet, Craftsman, and Troy-Bilt. It transfers power from the engine pulley to the mower deck spindles, enabling blade rotation for cutting grass.

Fitment & Compatibility

Check these before buying:

• Deck size: Must be a 42-inch cutting deck (not 46" or 50").
• Model numbers: Fits MTD/Cub Cadet/Craftsman models XT1, XT2, LT42 (including EFI, KH, KW variants), LX42 (including KH, KW, EFI), T8000, T7800, T210, and TB1942.
• OEM cross-references: Replaces OEM part numbers 954-05021, 754-05021, and 754P05021.
• Measurements: Belt is 1/2" wide x 99.75" long. Measure your old belt end-to-end (flat, not twisted) to confirm length.
• Not universal: Won’t fit 42" decks on non-MTD brands (e.g., John Deere, Husqvarna) or tractors with different deck belt routing.

Key Things to Know

• Quality: This is an aftermarket belt, not OEM. Most users report it matches OEM specs and lasts a full season with normal use.
• Installation difficulty: Moderate. You’ll need to release deck tension, route around pulleys, and re-tension. A diagram is helpful—take a photo of the old belt path before removing.
• Common gotchas: Check that all deck spindles spin freely before installing. A seized spindle will shred a new belt quickly. Also verify the belt isn’t twisted during installation.
• Length tolerance: 99.75" is precise. If your deck has an adjustable tensioner, a 0.25" difference usually works, but a too-short or too-long belt can cause slipping or premature wear.

Should You Buy It

If you own a 42-inch MTD/Cub Cadet/Craftsman tractor (XT1, LT42, LX42 series) and need a reliable, affordable replacement for a worn or broken deck belt, this is a solid choice. It fits the listed models exactly, has good reviews for durability, and costs less than OEM. Not ideal if you have a different brand or a non-42-inch deck.