954-04329A Mower Deck Belt Fit for MTD Cub-Cadet Troy Bilt RZT- L54 S54 LX54 ZT1-54 ZT-S54 Z6900 with 54" Deck Replace# 954-04329 754-04329 754-04329A (5/8" X 148-1/4")

What It Is

The 954-04329A is a replacement mower deck belt, 5/8" wide by 148-1/4" long, designed for 54" cutting decks on select MTD, Cub Cadet, and Troy-Bilt zero-turn mowers (RZT, LX54, ZT1-54, ZT-S54, Z6900 series). It drives the spindle pulleys to spin the blades.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size – This belt fits only 54" decks (not 46", 50", or 60").
2. Original belt measurements – OEM belts are 5/8" wide × 148-1/4" long. Measure your old belt end-to-end (flat, not looped) to verify.
3. OEM part numbers – Replaces MTD/Cub Cadet/Troy-Bilt #954-04329, 754-04329, and 754-04329A. If your mower uses a different number, double-check the specs.
4. Model series – Works on RZT-L54, S54, LX54, ZT1-54, ZT-S54, Z6900. Not for older RZT-50 or non-54" models.

Key Things to Know

• Aftermarket quality – This is a non-OEM belt. It uses standard Kevlar/cord construction; durability is good for homeowner use but may not match OEM lifespan under heavy commercial use.
• Installation difficulty – Moderate. You’ll need to release belt tension (spring-loaded idler pulley) and route the belt around all spindle and idler pulleys exactly as the old one was. Take a photo before removal.
• Common gotcha – The 148-1/4" length is critical. A belt 1/2" too short won’t engage the tensioner; 1/2" too long will slip or throw. Measure twice.
• Tension check – After installing, the belt should be snug with the idler arm at mid-travel. If it’s loose or too tight, recheck routing.

Should You Buy It

If you have a 54" MTD/Cub Cadet/Troy-Bilt zero-turn and need a reliable, affordable belt for residential mowing, this is a solid choice. It’s not built for daily commercial use, but for most homeowners it will perform well for 1-2 seasons. Skip it if you want OEM or need a belt for a different deck size or brand.