Exmark 116-5175-S Extreme Blade Set Lazer Z AC AS CT HP Front Runner 52 Inch 3 Pack

What It Is

The Exmark 116-5175-S Extreme Blade Set is a factory OEM blade kit designed for Exmark Lazer Z, AC, AS, CT, and Front Runner mowers with 52-inch decks. It includes three blades built for high-output cutting in commercial or heavy residential use.

Fitment & Compatibility

• Deck size: 52 inches only. Measure your deck width before ordering.
• Compatible models: Exmark Lazer Z (AC, AS, CT), Front Runner, and select Lazer Z X-Series with 52-inch decks. Confirm your deck serial number against Exmark’s compatibility list.
• OEM vs aftermarket: This is genuine Exmark, so bolt pattern, blade length (~17.5 inches center-to-center), and thickness are guaranteed to match factory specs. Aftermarket versions may vary.
• What to check: Count the number of blades on your deck (should be 3). Verify your deck’s spindle/bolt size (typically 5/16-inch or 3/8-inch; this kit uses 5/16-inch bolts). Inspect current blade part number—116-5175-S replaces earlier 116-5175.

Key Things to Know

• Blade design: Extreme blades have a higher lift angle for better mulching and bagging, but may reduce battery runtime on electric models. Expect a slight increase in noise vs standard blades.
• Installation difficulty: Moderate. Requires a socket wrench, torque wrench (recommended 70-90 ft-lbs), and jack stands to safely tilt the mower. Always disconnect the spark plug.
• Common gotchas: These blades are heavier than standard ones—ensure your spindle bearings are in good shape. Don’t mix with other blade types on the same deck. Check for bent spindles if blades wear unevenly.
• Sharpening: Can be sharpened 2-3 times before replacement, but avoid overheating the steel (loses hardness). Replace when tip thickness drops below 1/8 inch.

Should You Buy It

Buy this if you need OEM-grade reliability for a 52-inch Exmark ZTR and want the best mulching or bagging performance from your deck. It’s ideal for commercial operators or homeowners who mow frequently and don’t want to gamble on aftermarket fit. Skip it if you only need basic side-discharge cutting—standard Exmark blades are cheaper and quieter for that use.