954-04329A Lawn Mower Deck Belt 5/8" x 148.25" for Cub Cadet 54" RZT Deck ZT1 54 RZT- L54 S54 LX54, Troy Bilt Mustang XP 54", 954-04329 754-04329 490-501-M067 Craftsman MTD Z6900 Z6600 Z560 (Aramid)

What It Is

This is a 5/8-inch wide, 148.25-inch long aramid-reinforced deck belt designed to drive the blades on 54-inch zero-turn mowers from Cub Cadet, Troy-Bilt, Craftsman, and MTD. It’s a direct replacement for OEM part numbers 954-04329, 754-04329, and 490-501-M067.

Fitment & Compatibility

Before buying, confirm your mower has a 54-inch fabricated deck (not stamped) and uses a two-belt system (this is the primary deck belt). Check your current belt’s part number or measure it: length must be exactly 148.25 inches, width 5/8 inch. Fits models including Cub Cadet RZT 54, ZT1 54, RZT-L54, S54, LX54; Troy-Bilt Mustang XP 54; Craftsman Z6900, Z6600, Z560; and MTD equivalents. Does not fit 46-inch or 50-inch decks, or any Zero-Turn with a single-belt system. If your mower uses a different OEM belt number (e.g., 954-04330), this won’t work.

Key Things to Know

• Aramid construction is stronger than standard rubber—better heat resistance and longer life, but slightly stiffer when new.
• Installation difficulty: moderate. You’ll need to remove the deck or at least the belt covers, and often loosen the idler pulley. Plan 30–45 minutes.
• Common gotcha: This belt is directional on some decks—check the routing diagram on your mower’s deck or manual. Reversing it can cause premature wear.
• OEM vs aftermarket: This is a direct OEM replacement from Cub Cadet, so fit is guaranteed. Aftermarket versions may vary in length by 0.1–0.2 inches, causing slippage.

Should You Buy It

Buy this if you have a 54-inch Cub Cadet, Troy-Bilt, Craftsman, or MTD zero-turn with a fabricated deck and need a reliable, direct-fit replacement. It’s a solid upgrade over standard rubber belts for mowers used in heavy or tall grass. Skip it if your deck size or model number isn’t listed—measure your old belt first to avoid returns.