72511-VK6-000 & 72531-VK6-010 Lawn Mower Blade Kit,21 inch Mulching Blades Compatible with Honda HRC216K2, HRC216K2 HXA, HRC216K3, HRC216K3 PDA, HRC21

What It Is

This is a genuine Honda 21-inch mulching blade kit (OEM part numbers 72511-VK6-000 and 72531-VK6-010) designed for Honda HRC216 commercial walk-behind mowers. It includes two blades for a 21-inch cutting deck, optimized for fine mulching performance in residential or light commercial use.

Fitment & Compatibility

• Deck size: 21 inches (measure your existing blade length edge-to-edge; must be exactly 21 inches).
• Compatible models: Honda HRC216K2, HRC216K2 HXA, HRC216K3, HRC216K3 PDA, HRC21 (check your model number on the mower’s serial plate).
• OEM vs aftermarket: These are genuine Honda parts, so fitment and blade geometry are guaranteed for listed models. Aftermarket blades may vary in thickness, hole pattern, or lift angle—check that center hole diameter matches (typically 1 inch on Honda HRC decks).
• What to verify: Confirm blade adapter/shaft type (some HRC models use a star-shaped adapter; this kit fits standard 5-point star pattern). Also check that your mower uses two separate blades (not a single bar blade).

Key Things to Know

• Quality: Made from hardened steel with a balanced design for reduced vibration. Mulching performance is excellent—cuts clippings fine enough to leave on the lawn.
• Installation: Moderate difficulty—requires removing the center bolt and blade adapter. Use a torque wrench (30-35 ft-lbs) and lock the blade with a block of wood. Sharp edges; wear gloves.
• Common gotcha: These blades are not compatible with Honda HRR or HRS series (different spindle/bolt pattern). Also, if your HRC deck has a blade stop system, ensure the blade’s hole pattern aligns.
• Pairing: Always replace both blades at once to maintain balance.

Should You Buy It

Buy this kit if you own one of the listed Honda HRC216 models and want OEM-grade mulching blades that fit perfectly, last longer than cheap aftermarket options, and deliver clean, fine clippings. It’s not for non-HRC decks or budget builders—the price reflects genuine Honda quality and reliability.