CUB CADET 742P05516 21" Blade Ultima ZTX4-60 ZTX5-60 ZTX6-60 Zero-Turn Mowers 3-Pack Review

Overview

The Cub Cadet Ultima ZTX4-60, ZTX5-60, and ZTX6-60 are a trio of heavy-duty zero-turn mowers designed for homeowners with large properties—think 2 acres or more—who want commercial-grade cutting power without the commercial price tag. This 3-pack listing (model 742P05516) refers to the 21-inch blade set that fits all three machines, not three entire mowers. It’s built for buyers who need speed, durability, and a pristine cut on challenging terrain.

Who Should Buy This

• Large-lot homeowners (2+ acres): If you’re mowing a sprawling yard with trees, slopes, or obstacles, the Ultima ZTX series delivers the cut quality and speed to finish in under an hour, where a standard rider would take twice as long.

• Hobby farmers or rural property owners: Those managing uneven ground, tall grass, or light brush will appreciate the fabricated deck and high-lift blades that handle tough conditions without clogging.

• Lawn care enthusiasts who value precision: If you obsess over stripe patterns and even cuts, the 60-inch deck with adjustable blade speed gives you the control to create professional-looking results.

• Buyers upgrading from entry-level zero-turns: If you’ve outgrown a budget unit that bogs down or feels flimsy, the Ultima ZTX line offers a noticeable step up in frame stiffness, engine power, and long-term reliability.

Key Features Breakdown

• 60-Inch Fabricated Deck: Unlike stamped decks found on cheaper mowers, this is welded from heavy-gauge steel. It resists cracking, holds up to rocks and roots, and provides a consistent cutting deck that doesn’t flex under load. Best for rough properties where a stamped deck would warp over time.

• 21-Inch High-Lift Blades (3-Pack): These blades create strong suction to stand grass up for a clean cut and improve bagging or discharge performance. The 21-inch length is specific to the ZTX4/5/6 models, so don’t expect them to fit other Cub Cadet decks. They’re ideal for thick, lush grass or when mulching in damp conditions.

• Zero-Turn Maneuverability: With independent wheel motors, you can spin on a dime—literally zero-turn radius. This is a game-changer for yards with lots of trees, flower beds, or tight corners where a traditional tractor would require multiple passes.

• Heavy-Duty Transmission (ZTX4/5/6 variations): The ZTX4 uses a Hydro-Gear ZT-2800, the ZTX5 upgrades to ZT-3100, and the ZTX6 features ZT-3400. Higher numbers mean better heat dissipation and longer life under heavy use. For 2-3 acres, the ZT-2800 is fine; for 4+ acres or hilly terrain, step up to the ZT-3100 or 3400.

• High-Back Suspension Seat: A 15-inch seat with adjustable lumbar support and coil-over shocks. This isn’t a luxury—it’s a necessity when mowing for 2+ hours. The suspension absorbs bumps from uneven ground, reducing fatigue significantly.

• Electric Blade Engagement: Push a button to start and stop the blades—no manual lever to yank. It’s a small convenience that adds up over a long mowing session, especially when you need to disengage to cross a driveway or avoid obstacles.

Pros

1. Cut quality is exceptional. The combination of a rigid fabricated deck and high-lift blades produces a clean, even cut even in thick or wet grass. You won’t see ragged tips or missed patches.

2. Built to last. The deck, frame, and transmission are all commercial-grade components. With proper maintenance, this mower should outlast two or three entry-level zero-turns.

3. Fast mowing. The 60-inch deck and zero-turn agility let you cover ground quickly—expect to finish a 3-acre lawn in about 45 minutes, depending on obstacles.

4. Comfortable for long sessions. The suspension seat and ergonomic controls mean less back pain and arm fatigue. You can mow for hours without feeling beat up.

5. Easy maintenance. Access to the engine, air filter, and oil filter is straightforward. The deck lifts easily for cleaning, and blade changes are simple with the 21-inch blade set.

6. Versatile cut options. You can mulch, bag, or side-discharge with the right attachments. The high-lift blades work well with the bagging system, which is a plus for leaf cleanup in fall.

Cons

1. Expensive for the blade set. At $115.77 for three blades, this is a premium price. You can find compatible aftermarket blades for less, though they may not match the OEM quality or balance.

2. Not for small yards. The 60-inch deck is overkill on anything under an acre—you’ll struggle to maneuver in tight spaces, and the mower is heavy (around 700-800 pounds), which can rut soft ground.

3. Steep learning curve for zero-turn beginners. If you’re used to a traditional steering wheel, the lap bars take practice. Expect a few zigzag lines and close calls with flower beds until you get the hang of it.

4. No LED headlights on base models. The ZTX4 lacks integrated lights, so if you mow in the evening or early morning, you’ll need to add aftermarket lighting.

Bottom Line

The Cub Cadet Ultima ZTX4-60, ZTX5-60, and ZTX6-60 are serious tools for serious homeowners. They deliver commercial-grade cut quality, durability, and speed that justify the investment, especially if you’re mowing 2 acres or more. The 21-inch blade 3-pack is a necessary replacement part—buy it when your original blades dull, and you’ll maintain that factory-fresh performance. If you’re on the fence between an entry-level zero-turn and this line, go with the Ultima ZTX; it’s built to last a decade or more, while cheaper models often start showing wear in three years. For anyone who values their time and wants a pristine lawn without fighting a machine, this is a top-tier choice.

Frequently Asked Questions

Q: Will these 21-inch blades fit my Cub Cadet ZTX4 with a 60-inch deck?
Yes, this 3-pack is specifically designed for the ZTX4-60, ZTX5-60, and ZTX6-60 models. They are not compatible with other Cub Cadet zero-turns (like the ZT1 or ZT2) or smaller deck sizes. Always double-check your deck model number before ordering.

Q: How often should I replace these blades?
Replace them every 25-50 hours of mowing, or sooner if you hit rocks, roots, or debris that dull or nick the edges. Dull blades tear grass instead