754P05874 Transmission Drive Belt Compatible with Cub Cadet RZT Mowers (2019 -) with 42" 46" 50" 54" and 60" Decks Ultima Series ZT1-42 KH/46/50 KW/54 KH, ZT2-50 KW/54 KW/60 KW and ZT3-60 KW

What It Is

This is a replacement transmission drive belt for Cub Cadet RZT zero-turn mowers (2019 and newer) with 42", 46", 50", 54", and 60" decks, specifically designed for the Ultima Series ZT1, ZT2, and ZT3 models. It transfers power from the engine to the hydrostatic transmissions, enabling forward and reverse movement.

Fitment & Compatibility

Before buying, confirm your mower is a Cub Cadet RZT Ultima Series from 2019 or later with one of these deck sizes: 42", 46", 50", 54", or 60". Compatible models include ZT1-42 KH, ZT1-46/50 KW, ZT1-54 KH, ZT2-50/54/60 KW, and ZT3-60 KW. This is an aftermarket belt (OEM part # 754P05874), so measure your old belt’s length and width—common specs are 1/2" wide by roughly 92-96" long depending on deck size. Check your mower’s serial number and deck type (e.g., “KH” or “KW” stamped on the frame) to avoid mismatch. Not for older RZT series (pre-2019) or non-Ultima models.

Key Things to Know

• Quality vs. OEM: Aftermarket belt is about 30-40% cheaper than OEM Cub Cadet, but some users report slightly shorter lifespan (1-2 seasons vs. 2-3 seasons). Fine for light-to-medium use.
• Installation difficulty: Moderate—requires removing the deck or accessing the transmission pulleys. Have a wrench set and belt diagram handy (check your owner’s manual or online). Plan 30-60 minutes.
• Common gotcha: Belt routing is specific to your deck size; double-check the diagram. Incorrect tension can cause slipping or premature wear. Also verify pulley condition—worn pulleys will shred a new belt quickly.
• Return policy: Since it’s a wear item, many sellers won’t accept returns after installation. Confirm fitment thoroughly before cutting the packaging.

Should You Buy It

This belt is a solid, budget-friendly choice for Cub Cadet RZT Ultima owners who need a quick replacement and don’t mind slightly shorter lifespan than OEM. It’s ideal for residential use or light commercial mowing. If you mow heavy commercial acres daily, stick with the OEM belt for maximum durability.