Aeagle RZT50 50" Deck Rebuild Kit for Cub Cadet/MTD/Troy-Bilt — 3 Spindles, 3 Blades, Belt & Wheels

The Aeagle RZT50 618-04126 rebuild kit is a complete 50" deck replacement set that restores spindle assemblies, blades, idlers, belt and deck wheels for Cub Cadet, MTD, Troy-Bilt and compatible zero-turn mowers.

This kit gathers the most frequently replaced deck components into one purchase so you can refresh a worn mower deck quickly and get consistent cutting performance across all three spindles. Built to fit many RZT50, ZT50 and Mustang 50" models, the set includes three spindles, three blades, idlers/pulleys, a deck belt and four deck wheels — everything needed for a thorough deck rebuild without hunting down individual parts.

Which mower models and part numbers does this kit fit?

The kit is engineered for a long list of Cub Cadet, MTD, and Troy-Bilt 50" deck models across model years up to 2014 and some earlier machines. It cross-references the original OEM part numbers so you can confirm compatibility before ordering.

• Fits Cub Cadet RZT50 series (2007–2014 variants listed) and related MTD models such as ZT50, LTX1050, and SLTX1050.
• Includes cross-replacements for Troy-Bilt Mustang XP and Mustang RZT 50 part numbers provided in the product details.
• Replaces common part numbers like 618-04125/618-04126 spindles, 742-04053 blades, 754-04044 belt, and various idler/pulley/nut numbers.

What exactly is in the kit and what are the key dimensions?

This bundle contains the critical items for a three-spindle 50" deck rebuild so you don’t have to mix and match parts. Dimensions and replacement numbers are listed to help you verify fit with your mower.

• 3 spindles — height 6 1/8"; replaces 618-04125/618-04126 and compatible codes.
• 3 blades — 50" deck blades, 17.8" long by 2.375" wide, center 6-point star hole (fits Craftsman SPM199562627).
• Idlers/pulleys — set of 3 idlers and 3 pulleys replacing 753/756/956 series part numbers.
• Belt — one 1/2" x 134" deck belt replacing 754-04044 series; 4 deck wheels — 5" diameter, 2-3/8" width, 1/2" bore.

How will installing this kit affect my mower's performance and maintenance?

Replacing worn spindles, blades and belt together restores deck geometry and belt tension, which improves cut quality and reduces vibration. New idlers and pulleys maintain correct belt routing and extend the life of the new belt and blades.

• Sharper, more even cuts by replacing all three blades at once for balanced rotation.
• Reduced deck vibration and wobble after spindle replacement for longer component life.
• Improved belt tracking and fewer slippages thanks to fresh idlers and a correctly sized belt.

Who is this kit for: This Aeagle rebuild kit is intended for homeowners and professional landscapers who own a compatible 50" Cub Cadet, MTD or Troy-Bilt zero-turn mower and want a single, confirmed-compatible parts solution for a full deck refresh. It suits technicians replacing multiple deck items in one service, DIYers who want to avoid sourcing individual OEM parts, and anyone restoring cutting performance on aging RZT50/ZT50/Mustang 50" decks. Check the cross-reference list and your mower's model/year before purchasing to ensure a match.