CUB CADET 490-110-F204 Xtreme Blade Set 50" Deck Ultima ZT1-50 Zero-Turn Lawn Mowers 490-110-C204

What It Is

This is a set of three OEM Xtreme blades designed for 50-inch cutting decks on Cub Cadet Ultima ZT1-50 zero-turn mowers. They are built for high-lift grass discharge and mulching performance in residential and commercial-style mowing.

Fitment & Compatibility

• Deck size: 50 inches (requires three blades).
• Models confirmed: Cub Cadet Ultima ZT1-50, ZT1-50E, ZT1-50KW, and ZT1-50FAB. Also fits select 50-inch decks on ZT2 and ZTX series, but verify by deck part number.
• OEM part number: 490-110-C204 (supersedes older 490-110-F204).
• Measurement check: Blade length = 18.25 inches, center hole = 5/8 inch (hex), blade thickness = 0.204 inch. Measure your current blades—any variation means incorrect fit.
• Aftermarket caution: Do not substitute non-OEM “Xtreme” blades—dimensions, heat treat, and balance differ. Only use genuine Cub Cadet 490-110-F204/C204 for guaranteed fit.

Key Things to Know

• Quality: Factory OEM with hardened steel and coated edge for wear resistance. Expect 25–40 hours of mowing life before sharpening, depending on debris.
• Installation: Requires a 15/16-inch socket and torque wrench set to 70–80 ft-lbs. Center bolt is reverse-thread on some models—check your manual.
• Gotcha: The blades are directional—the wing tip must face up toward the deck. Install upside down and you’ll get poor cut and vibration.
• Balance: Each blade is factory balanced, but after sharpening, re-check balance to avoid spindle wear.

Should You Buy It

If you own a Cub Cadet Ultima ZT1-50 with a 50-inch deck and want a drop-in, guaranteed fit with factory cutting performance, this blade set is the right choice. It’s priced higher than aftermarket options, but the reliability and sharpness out of the box justify the cost. Skip it if you have a different brand deck or a smaller/larger deck size—those need their own specific blades.