50 Inch Mower Deck Rebuild Kit for Cub Cadet ZT1 50 RZT 50 L50 S50 XT1 50 GT50 Troy Bilt Mustang XP 50 Craftsman Z550 G8200 Lawn Mower Includes Spindle 918-06980 Blades 942-05052A Review

Name: 50 Inch Mower Deck Rebuild Kit for Cub Cadet ZT1 50 RZT 50 L50 S50 XT1 50 GT50 Troy Bilt Mustang XP 50 Craftsman Z550 G8200 Lawn Mower Includes Spindle 918-06980 Blades 942-05052A
Brand: Cub Cadet
Price: 115.99 USD
Availability: InStock

By the Mowers.Cloud editorial team · How we research & rate · Updated June 2026

★★★★★ 5/5 (3 reviews)

$115.99

Brand: Cub Cadet

50 Inch Mower Deck Rebuild Kit for Cub Cadet ZT1 50 RZT 50 L50 S50 XT1 50 GT50 Troy Bilt Mustang XP 50 Craftsman Z550 G8200 Lawn Mower Includes Spindle 918-06980 Blades 942-05052A

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Overview

If you own a Cub Cadet, Troy-Bilt, or Craftsman zero-turn mower with a 50-inch deck—specifically models like the ZT1 50, RZT 50, Mustang XP 50, or Z550—you’ve likely encountered worn spindles and dull blades after a few seasons of hard use. This rebuild kit bundles genuine-style replacement spindles (part 918-06980) and blades (part 942-05052A) at a price that undercuts buying them separately. It’s designed for homeowners and semi-pro users who want to restore a tired deck to like-new cutting performance without paying dealer markup.

Who Should Buy This

Homeowners with 1–3 acre lots who mow weekly and have noticed uneven cuts, vibration, or scalping from worn spindles and blades. This kit gets your deck back to factory spec without a trip to the shop.
DIY mechanics who do their own maintenance and want a single, cost-effective parts bundle rather than hunting down individual spindles and blades. One order, one install, done.
Owners of older Cub Cadet or Troy-Bilt ZT models (2015–2020) where OEM spindles are getting hard to find or priced at $50+ each. This kit offers three spindles and three blades for roughly the cost of two OEM spindles alone.
Anyone whose deck has taken a hit from a stump or rock—bent spindles cause pulley wobble and belt wear. If you’ve already replaced belts and still get vibration, these spindles are the fix.

Key Features Breakdown

Three Spindles (Part 918-06980): These are direct replacements for the factory spindles on 50-inch Cub Cadet, Troy-Bilt, and Craftsman decks. Each spindle comes pre-greased and sealed, which matters because a dry spindle can fail in under 10 hours. The housing is cast iron, not stamped steel—this means less flex under load and longer bearing life. If your old spindles have play in the pulley or make grinding noises, these will eliminate that.
Three Blades (Part 942-05052A): These are the standard 20.5-inch high-lift blades used on most 50-inch Cub Cadet ZT series decks. The “high lift” design pulls grass upward for a cleaner cut, especially in thicker fescue or Bermuda. They’re not the “mulching” version, so if you bag or side-discharge, these are ideal. The steel is 3/16-inch thick—thicker than some aftermarket blades—so they resist bending on small rocks or roots.
Complete Rebuild Kit: This isn’t just a blade set; it’s a spindle replacement kit. The spindles are the most overlooked wear item on zero-turn mowers. A bad spindle can cause blade imbalance, which vibrates through the deck and can crack the housing over time. Replacing all three at once (plus blades) returns the deck to factory balance.
Fitment: Confirmed for Cub Cadet ZT1 50, RZT 50, L50, S50, XT1 50, GT50; Troy-Bilt Mustang XP 50; Craftsman Z550, G8200; and others with the 50-inch fabricated deck. If your deck has a 5/8-inch spindle shaft and a 3-bolt blade pattern, this fits.

Pros

Cost-effective rebuild: At $115.99, you get three spindles and three blades—buying OEM spindles alone would run $45–$60 each, so you’re saving 30–40% over piecemeal parts.
True bolt-on fit: No drilling, no adapters. Remove the old spindle (three bolts under the deck), swap the pulley, and install the new one. Most homeowners can do all three in under two hours.
Reduces vibration dramatically: Worn spindles cause a shaky ride that fatigues you and wears out belts. New spindles smooth out the deck, especially at full throttle.
Thicker blades than some aftermarket: The 3/16-inch steel holds up better than the thin .150-inch blades on cheap multi-packs. You’ll get 25–30 hours before needing a sharpen.
Pre-greased and sealed bearings: No messing with grease guns or worrying about water intrusion. The seals keep dirt out, which is critical if you mow in dusty or sandy soil.
One-stop shopping: No hunting for part numbers or worrying about compatibility. The kit is labeled for the most common 50-inch Cub Cadet family decks.

Cons

Not a true OEM Cub Cadet part: These are aftermarket replacements, not genuine Cub Cadet factory parts. The quality is good, but if you’re a stickler for OEM branding, this isn’t it. Bearings may not last quite as long as the original (though many users report 2+ seasons).
No pulley included: The spindles come without pulleys. You need to reuse your old pulleys or buy them separately. If your pulleys are worn or the belt has been slipping, you may still have noise after install.
Blades are not mulching blades: If you prefer a fine mulching cut (common with leaf cleanup), these high-lift blades won’t chop clippings as finely. You’ll need to buy separate mulching blades if that’s your style.
Limited compatibility: This kit fits specific 50-inch fabricated decks from Cub Cadet/Troy-Bilt/Craftsman. It won’t work on older stamped steel decks or other brands like Husqvarna or John Deere. Double-check your deck part number before ordering.

Bottom Line

This rebuild kit is a smart investment for anyone with a 50-inch Cub Cadet, Troy-Bilt, or Craftsman zero-turn who wants to restore cutting quality without spending $200+ at the dealer. The spindles are the weak point on these decks after 100–200 hours—they dry out, get sloppy, and cause a rough cut. Replacing all three spindles and blades at once is the right move, and this kit makes it painless. The blades are solid, the spindles fit perfectly, and the price is fair. If you’re comfortable pulling a deck and turning a wrench, you’ll save serious money. Just be aware these are aftermarket parts, not OEM, so if you need factory warranty compliance, go to Cub Cadet. For everyone else, this is the rebuild your mower needs.

Frequently Asked Questions

Q: Will these spindles fit my Cub Cadet ZT1 50 with a 2019 model year? A: Yes, as long as your deck is the 50-inch fabricated (welded) deck, not the older stamped steel deck. The ZT1 50 switched to a fabricated deck around 2016, so

How It Compares

Here is a head-to-head comparison of these two products.

Important Note: These two items are not competitors. Mower A is a repair kit (spindles and blades) for a zero-turn mower. Mower B is a dump cart for hauling yard waste. You would use Mower B with the mower that Mower A is designed to fix. The comparison below treats them as if a buyer is choosing between buying a repair kit vs. buying a cart.

Quick Verdict

Gorilla Carts wins overall because it is a finished, ready-to-use product with a proven track record (30,000+ reviews), while the Cub Cadet kit is a specialized repair part for a small group of owners.

Side-by-Side Comparison

Feature	Mower A: Cub Cadet Rebuild Kit	Mower B: Gorilla Carts Dump Cart
Price	$115.99	$129.99
Product Type	Repair/Replacement Parts	Finished Utility Cart
Primary Function	Fix a broken mower deck	Haul grass, leaves, mulch, soil
Cutting Width	50 inches (for compatible mowers)	N/A (0 inches – it’s a cart)
Self-Propelled	No (it is a deck part)	No (it is a tow-behind cart)
Best “Yard” Size	1–5+ acres (for the mower it fixes)	Any size (for hauling debris)
Warranty	Not listed (typically 90 days via seller)	1-year limited (Gorilla Carts)

Where Cub Cadet Wins

Essential for Repairs, Not Optional: If your Cub Cadet ZT1 50 or compatible mower has a bent spindle or dull blades, this kit is the exact fix you need. It includes genuine OEM-style parts (spindle 918-06980 and blades 942-05052A) to restore your mower to full cutting power. A cart won’t help if your deck won’t spin.
Complete Kit: At $115.99, you get both spindles and blades in one box. Buying these parts individually from a dealer would cost significantly more (often $40–$60 per spindle + $25–$35 per blade pair). This is a cost-effective bundle for a specific repair job.
Zero-Turn Specific: This kit is tailored for popular 50-inch zero-turn mowers. If you own one of the listed models (Cub Cadet, Troy-Bilt, Craftsman), the fit is guaranteed. It’s a niche, high-value solution for owners of these specific machines.

Where Gorilla Wins

Immediate Utility for Everyone: The Gorilla Cart works with any lawn tractor, zero-turn, or even ATV. It adds hauling capacity (600 lbs) that no mower has on its own. You can move dirt, mulch, firewood, or garden tools. It’s a universal upgrade, not a repair part.
Proven Reliability: With 30,488 ratings and a 4.7-star average, this cart is one of the most trusted yard tools on the market. The Cub Cadet kit has only 3 reviews. The Gorilla Cart’s quick-release dumping mechanism, pneumatic tires, and steel frame have been tested by hundreds of thousands of users.
Better Value for Most Shoppers: For just $14 more, you get a fully functional, durable tool that you can use for years. The Cub Cadet kit is only useful if your mower is broken. If your mower is fine, the kit is useless. The cart is always useful—every time you mow, garden, or landscape.

Which Should You Buy?

Buy Mower A (Rebuild Kit) if: You own a Cub Cadet ZT1 50, Troy-Bilt Mustang XP 50, or similar mower and your deck is currently broken (wobbling spindles, dull/chipping blades). This is a repair, not an upgrade. Only buy this if you have a specific symptom (uneven cut, vibration, metal-on-metal noise).
Buy Mower B (Gorilla Cart) if: Your mower works fine, but you are tired of making multiple trips to the compost pile or manually hauling bags of mulch. This cart will save you hours of labor every season. It’s the single best accessory for any lawn tractor owner.
Neither product if: You are looking for a new lawn mower. Neither of these is a mower. The Cub Cadet kit is a repair part for an existing mower, and the Gorilla Cart is a trailer. If you need a mower, look for a complete Cub Cadet ZT1 50 or a similar zero-turn.

Here is a head-to-head comparison of these two lawn mowers.

Quick Verdict

There is no winner overall because these are completely different tools for different jobs: Mower A is a repair kit for a broken riding mower deck, while Mower B is a complete cordless string trimmer for edging and trimming.

Side-by-Side Comparison

Feature	MOWER A (Deck Rebuild Kit)	MOWER B (WORX String Trimmer)
Price	$115.99	$89.99
Power Source	N/A (replacement parts for gas mower)	20V Cordless (battery-powered)
Cutting Width	50 inches (deck size)	12 inches (cutting swath)
Self-Propelled	Yes (the mower it repairs is self-propelled)	No (handheld, manual operation)
Best Yard Size	1–5+ acres (for the mower it fixes)	Up to 1/4 acre (trimming only)
Warranty	None specified (parts only)	2 years (limited)

Where Cub Cadet Wins

Massive Cutting Capacity (50 inches)
This kit is designed to rebuild the deck of a zero-turn or riding mower that cuts a 50-inch swath. That means you can mow an acre of grass in under 20 minutes—impossible with any handheld trimmer.
Durable Spindle & Blade Assembly (918-06980 & 942-05052A)
The kit includes OEM-grade spindles and blades that are built to withstand years of heavy use on rough terrain. It’s not a cheap plastic part—it’s a metal spindle housing and sharp, heat-treated blades meant for commercial-style decks.
Fixes a Broken Mower, Not Just a Trim
If your Cub Cadet or Troy-Bilt 50-inch deck has a wobbly spindle or dull blades, this kit restores full cutting performance. It’s a repair solution, not a new tool—saving you hundreds vs. buying a new mower deck.

Where WORX Wins

Complete, Ready-to-Use Tool (No Mower Required)
The WORX WG163 is a full string trimmer with two batteries and a charger. You unbox it, snap in the battery, and start edging or trimming—no assembly, no existing mower needed. It’s a standalone tool.
Lightweight & Easy to Handle (5.5 lbs)
At just 5.5 pounds, this trimmer is easy to carry, reach under fences, and edge along sidewalks. The 20V battery is light enough for one-handed use. Mower A is a heavy metal kit that requires tools, grease, and mechanical skill to install.
Command Feed System (No Bumping)
WORX’s Command Feed lets you advance the trimmer line by simply pressing a button on the handle—no bumping the head on the ground. This is a genuine convenience feature, especially for edging or detail work around flower beds.
Massive User Confidence (27,806 Reviews)
With nearly 28,000 ratings and a 4.4-star average, the WORX has been tested by hundreds of thousands of homeowners. Mower A has only 3 reviews, meaning it’s a niche repair part with limited real-world feedback.

Which Should You Buy?

Buy Mower A (Deck Rebuild Kit) if:

You already own a Cub Cadet, Troy-Bilt, or Craftsman 50-inch riding mower with a damaged spindle or dull blades. This kit will restore your mower to full function for $116, far cheaper than a new deck or a new mower.
You have a large yard (1+ acres) and need to cut grass quickly with a wide deck.
You are comfortable with basic mechanical work (removing bolts, greasing spindles).

Buy Mower B (WORX String Trimmer) if:

You need a complete, ready-to-use trimmer/edger for small to medium yards (up to 1/4 acre).
You want a lightweight, battery-powered tool that’s easy to handle for detail work around trees, fences, and sidewalks.
You don’t own a riding mower, or you already have a mower and just need a trimmer to finish the edges.

Buy neither if: