954-04044A 754-04044 Mower Deck Belt for Cub Cadet RZT 50 ZT1 50 Ultima 50 Inch Deck, Troy-Bilt Mustang XP 50, Kevlar Cord, 1/2" x 134"

What It Is

This is a 1/2-inch wide, 134-inch long Kevlar-cord replacement deck belt for 50-inch zero-turn and lawn tractors. It drives the mower blades from the engine pulley, designed for heavy-duty residential use on Cub Cadet RZT 50, ZT1 50, Ultima 50, and Troy-Bilt Mustang XP 50 models.

Fitment & Compatibility

Before buying, confirm your mower has a 50-inch deck—this belt will not fit 42-inch or 54-inch decks. It replaces OEM part numbers 954-04044A and 754-04044. Fits Cub Cadet RZT 50, ZT1 50, Ultima 50 (2018+), and Troy-Bilt Mustang XP 50 (2017+). Also works with some Craftsman and MTD 50-inch decks using the same belt length. Measure your old belt: it must be exactly 1/2 inch wide x 134 inches long. Check your owner’s manual or the belt routing diagram under the deck for confirmation. Aftermarket belts may vary slightly in thickness—verify it seats fully in all pulleys.

Key Things to Know

• Kevlar cord offers better heat resistance and lifespan than standard rubber belts, but still replace every 1-2 seasons under normal use.
• Installation difficulty: Moderate. You’ll need to remove the deck or use a spring tool to relieve tension on the idler pulley. Belt routing is critical—mismatch will cause slipping or blade disengagement.
• Common gotcha: This belt is longer than many 50-inch deck belts (134 inches vs. typical 130-132 inches). If your deck uses a shorter belt, this will not work even if the deck size matches.
• No pulleys included—buy separately if pulleys are worn or damaged.

Should You Buy It

Buy this if you need a direct replacement for a worn 954-04044A or 754-04044 belt on a Cub Cadet or Troy-Bilt 50-inch deck and want a durable upgrade over standard rubber. It’s a solid value for residential mowing, but if you have a different brand or deck size, double-check measurements first.