72511-VL0-S00 & 72531-VH7-000 Mower Blade Set（2 Pack） Compatiable with Hon-da HRR216 K9 PKAA VKAA VLAA VYAA K10 K11 Rotary Mower，21" Microcut Twin Blade Kit Lawn Mower Replacement Part

What It Is

This is a 2-pack set of 21-inch Microcut twin blades designed as a direct replacement for select Honda HRR216 rotary mowers—specifically the K9, PKAA, VKAA, VLAA, VYAA, K10, and K11 variants. The twin-blade design creates a finer mulch and improves bagging performance compared to a single blade.

Fitment & Compatibility

Before buying, confirm your mower deck size is exactly 21 inches and that your model is in the list above (check the model tag under the seat or on the deck). These blades are aftermarket replacements for OEM Honda parts 72511-VL0-S00 and 72531-VH7-000. Measure your old blade’s center hole diameter (typically 1-inch) and the overall length (21 inches) to verify fit. They will not fit HRR216 models with a different deck size or blade mounting system (e.g., the “K8” or earlier series). Always double-check the blade bolt size (usually 5/16″ or 3/8″) before installing.

Key Things to Know

• Quality: Aftermarket blades are often made from stamped steel—durable but not as thick as OEM. Expect a slightly shorter lifespan if you hit rocks or roots.
• Installation: Easy with basic tools (wrench, socket, jack stand). Lift the mower, remove the old blade bolt, swap blades, and torque the bolt to 30-40 ft-lbs. Use thread locker if the bolt is loose.
• Gotcha: The twin-blade design requires both blades to be installed correctly—check that the cutting edges face the same direction (both up or both down depending on your mower’s orientation). Improper alignment can cause vibration or poor cut.
• Balance: Aftermarket blades may need balancing out of the box. Use a blade balancer or hang them on a nail to check. An unbalanced blade can damage the spindle over time.

Should You Buy It

Buy this if you need a budget-friendly twin-blade replacement for a compatible Honda HRR216 and don’t mind slightly less durability than OEM. It’s ideal for homeowners who want improved mulching and bagging without paying OEM prices. Skip it if you need a heavy-duty blade for rocky terrain or if your mower isn’t on the compatibility list.