John Deere 42" Lawn Mower Deck Rebuild K vs 50 Inch Mower Deck Rebuild Kit for Cub C
Quick Verdict
If you own a John Deere 42-inch deck, the John Deere rebuild kit is the clear winner due to its higher rating, larger review base, and lower price. For owners of Cub Cadet or MTD RZT 50-inch decks, the Cub Cadet kit is the only direct fit option and offers good value for a larger cutting width. Neither kit is universally better—your choice depends entirely on your mower brand and deck size.
Side-by-Side
| Feature | John Deere 42" Kit | Cub Cadet / MTD 50" Kit |
|---|---|---|
| Price | $99.99 | $119.99 |
| Customer Rating | 4.4 / 5 (737 reviews) | 4.2 / 5 (36 reviews) |
| Deck Size | 42 inches | 50 inches |
| Best Yard Size | ½ – 1 acre | 1 – 2 acres |
| Compatibility | John Deere 42" decks | Cub Cadet / MTD RZT 50, RZT 50VT, RZT50 |
Where John Wins
Price and value. At $99.99, the John Deere kit is $20 cheaper than the Cub Cadet kit, making it a more budget-friendly rebuild option. With 737 reviews and a 4.4-star average, it has a proven track record—far more user feedback than the Cub Cadet kit’s 36 reviews. This suggests better quality control and consistent fitment for John Deere 42-inch decks.
Wider user confidence. The large review base indicates that many owners have successfully used this kit. Common praise includes easy installation, durable spindles, and a precise fit for 42-inch John Deere models. If you need a reliable, well-documented rebuild for a smaller lawn, the John Deere kit is the safer bet.
Where Cub Cadet Wins
Larger cutting width. The Cub Cadet kit is designed for 50-inch decks, which are better suited for mowing 1–2 acres or more. If you have a larger property, the extra 8 inches of cutting width can save significant time. This kit is specifically built for Cub Cadet and MTD RZT 50, RZT 50VT, and RZT50 zero-turn mowers.
Niche compatibility. For owners of those specific Cub Cadet or MTD models, this kit is the correct fit. It includes all necessary spindles, bearings, pulleys, and hardware for a 50-inch deck rebuild. While the review count is low, the 4.2-star rating suggests it works well for its intended use. The higher price reflects the larger deck size and specialized parts.
Which Should You Buy
Buy the John Deere 42" kit if: you own a John Deere mower with a 42-inch deck, have a yard under 1 acre, and want a proven, affordable rebuild with strong user support. The lower price and high rating make it a low-risk choice.
Buy the Cub Cadet / MTD 50" kit if: you own a Cub Cadet or MTD RZT 50, RZT 50VT, or RZT50 zero-turn mower with a 50-inch deck, and you mow 1–2 acres. This is the correct fit for your machine, and the larger deck will improve mowing efficiency.
Do not buy either if: your mower deck is a different brand or size. These kits are deck-specific—using the wrong one will cause fitment issues. Always confirm your deck make and cut width before purchasing.