Bularie Microcut High Lift Mulching Blades 2-Pack for 21" Honda Deck — Upper & Lower, High-Carbon Steel

Bularie’s 2-pack Microcut High Lift Mulching Blades (72531-VR8-M00 upper and 72511-VR8-M00 lower) are direct-fit replacement blades engineered to deliver finer clippings, stronger vacuuming lift, and durable performance for compatible 21-inch Honda mower decks.

If your Honda push or self-propelled mower uses a 21-inch deck and you want improved mulching and bagging without changing your mower, this matched set replaces the OEM upper and lower blades. Built from high-carbon steel with curvier cutting surfaces, the Microcut design chops grass into smaller pieces, helping clippings break down more quickly on the lawn or pack more efficiently into the bag. The pair is shaped and drilled to match OEM mounting points for a straightforward swap that restores cutting quality and lift.

How do these blades improve mulching and lawn health?

The Microcut geometry increases the number of cutting surfaces and the curvature at the blade tips, which produces finer clippings than standard blades. Finer clippings decompose faster when discharged back onto the lawn and can return nutrients to the soil without leaving visible clumps.

• Microcut edges create multiple shear points for finer mulch.
• High lift profile ensures better upward airflow for efficient clippings circulation.
• Less visible clumping; clippings break down more rapidly as organic matter.

Will these blades fit my Honda mower model and how do I check compatibility?

The set is designed to directly replace OEM part numbers 72531-VR8-M00 (upper) and 72511-VR8-M00 (lower) and fits many 21" Honda deck models. Before ordering, compare the blade dimensions and center-hole sizes to your existing blades to confirm an exact match.

• Check OEM part numbers stamped on your current blades for direct replacement.
• Compare measurements: upper 20.8"×2.52" (1.25" hole); lower 21"×2.5" (0.83" hole).
• Compatible Honda series include HRB, HRM, HRR, HRS, HRT and specific HRN216 variants.

How durable and sharp are these blades compared with OEM options?

Manufactured from premium high-carbon steel and finished for strength, these blades are thick and built to resist wear in demanding mowing conditions. They arrive with a sharp cutting edge and a high-lift profile that maintains cutting performance and airflow, offering long service life when properly maintained.

• Heavy-duty thick construction for impact resistance and longevity.
• High-carbon steel retains sharpness longer than lower-grade metals.
• Simple, OEM-style design for quick installation and reliable balance.

How do I install and maintain this twin-blade set safely?

Installation is a direct replacement procedure: disconnect the spark plug, tilt the mower safely, remove the old blades, and mount the upper and lower blades according to the manufacturer’s orientation. Regular sharpening, inspection for nicks, and torqueing bolts to the mower’s specification keep performance optimal and safe.

• Always disconnect spark plug before blade work for safety.
• Follow mower manual for blade orientation and bolt torque specs.
• Inspect blades after each season and sharpen or replace if nicked or bent.

Who is this for? This Bularie Microcut High Lift 2-pack is made for homeowners and landscape professionals who own compatible 21" Honda decks and want a reliable, OEM-fit replacement that improves mulching and bagging performance. It’s ideal for users who prefer retaining their mower’s original mounting pattern while upgrading to a blade set that produces finer clippings and stronger lift. If you need a precise fit, check the part numbers and blade measurements before purchase to ensure proper compatibility.