OEM Replacement - for Cub Cadet 954-05078 Belt,50 Inch ZT1 50 RZT 490-501-C070 Troy Bilt Mustang 754-05078 490-501-M070 Craftsman Z550 Z5600 Zero-Turn Mowers- Durable, Aramid Cord Belt

What It Is

This is a 50-inch deck drive belt designed for zero-turn mowers. It transfers power from the engine pulleys to the blades, and is built with aramid cord reinforcement for longer life under heavy use.

Fitment & Compatibility

• Deck size: Only for 50-inch cutting decks.
• Models confirmed fit: Cub Cadet ZT1 50, RZT 50; Troy-Bilt Mustang 50 (model 490-501-C070, 490-501-M070); Craftsman Z550, Z5600.
• OEM cross numbers: 954-05078, 754-05078, 490-501-C070, 490-501-M070.
• Before buying: Measure your existing belt length (should be ~94.5 inches) and check deck pulley configuration. This belt is a direct OEM replacement—no modifications needed if your mower matches listed models.
• Not compatible with 42-inch or 54-inch decks, or non-zero-turn tractors.

Key Things to Know

• Durability: Aramid cord is stronger than standard polyester—resists stretching and snapping from debris or sudden stops.
• Installation difficulty: Moderate. You’ll need to remove the deck or at least the belt covers, and use a wrench to release the idler pulley tension. A belt routing diagram is helpful (check your manual or online).
• Gotcha: Some users report the belt runs slightly tighter than OEM—if your pulleys are worn or misaligned, it may squeal or wear faster. Inspect pulleys and spindles before installing.
• Price vs. value: At ~$30, it’s cheaper than Cub Cadet branded belts but matches OEM specs. Good for budget-conscious owners who don’t want to risk cheap no-name belts.

Should You Buy It

If you own a Cub Cadet ZT1 50, RZT 50, Troy-Bilt Mustang 50, or Craftsman Z550/Z5600 and need a reliable, direct-fit replacement without paying dealer markup, this belt is a solid choice. It’s durable enough for residential and light commercial use, but skip it if your pulleys are worn or you need a belt for a different deck size.