954-05021 Mower Deck Belt 1/2" x100" for Cub Cadet XT1-LT42 and XT2-LX42 | with 42" Deck, MTD 42" Deck, 2015 & 2016 754-05021, 754-05021A, 954-05021A

What It Is

This is a replacement mower deck belt (1/2" wide x 100" long) for Cub Cadet XT1-LT42 and XT2-LX42 tractors with a 42" stamped deck, plus compatible MTD 42" decks from 2015–2016 models. It drives the spindle blades off the engine pulley.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size – Must be exactly 42" (measured blade tip to blade tip). This belt won’t fit 46" or 54" decks.
2. Model year – Verified for 2015 and 2016 XT1-LT42 and XT2-LX42 units. Later models (2017+) may use a different belt length.
3. OEM cross-references – Replaces Cub Cadet/MTD part numbers 754-05021, 754-05021A, and 954-05021A. If your original belt has a different number, measure its length and width before ordering.
4. Belt dimensions – 1/2" width, 100" outside circumference. Use a tape measure on your old belt (lay it flat, measure end-to-end) to double-check.

Key Things to Know

• Quality – This is a standard Kevlar/corded rubber belt, not heavy-duty. Expect 2–3 seasons under normal residential use. For frequent commercial cutting, consider a premium aftermarket belt.
• Installation – Moderate difficulty. You’ll need to remove the deck (two pins, belt tensioner release). Route the belt exactly as diagrammed on the deck sticker; reversing the twist causes rapid wear.
• Common gotcha – The belt tensioner spring must be fully released before routing. Forcing the belt over pulleys without releasing tension can damage the idler arm.
• Noise – A slight squeak during first hour is normal as the belt seats. Persistent squealing means incorrect routing or a worn pulley.

Should You Buy It

Buy this if you have a 2015–2016 Cub Cadet XT1-LT42 or XT2-LX42 with a 42" deck and need a direct OEM replacement at a low cost. Skip it if you have a different deck size, a newer model year, or want a heavy-duty belt for frequent heavy use.