72531-VR8-M00 & 72511-VR8-M00 Mower Blade Kit 21" for Honda | HRB215 HRB216 HRB217 HRM215 HRR216 HRS216 HRT216 HRN216 Propelled Lawn Mower 2 Pack

What It Is

This is a genuine OEM Honda 2-pack of 21-inch mower blades (part numbers 72531-VR8-M00 and 72511-VR8-M00) designed for Honda self-propelled mowers in the HRB, HRM, HRR, HRS, HRT, and HRN series. These are replacement blades for standard cutting and bagging use, not mulching blades.

Fitment & Compatibility

Deck size: 21-inch cutting deck only. Measure your existing blade length—if it’s not exactly 21 inches, these won’t fit.

Models: Fits Honda HRB215, HRB216, HRB217, HRM215, HRR216, HRS216, HRT216, and HRN216 series. Check your model number on the mower deck or under the seat.

OEM vs. aftermarket: These are genuine Honda parts, not generic. They match factory specifications exactly, so no adapters or modifications needed.

Key measurements: Blade length 21", center hole diameter 20mm, blade thickness 0.18". Verify your existing blade’s hole size and thickness before ordering—some aftermarket blades vary.

Key Things to Know

• Installation difficulty: Easy. One bolt per blade (usually 15mm or 5/8" socket). Torque to 35-45 ft-lbs; over-tightening can strip the adapter.
• Sharpness: OEM blades come sharp but not razor-edged. They cut well for grass but may need sharpening after 10-15 hours on tough turf.
• Balance: Each blade is factory-balanced. If you sharpen them, re-balance or replace to prevent vibration and bearing wear.
• Common gotcha: The 20mm center hole is larger than many aftermarket blades. If your mower uses a smaller hole (e.g., 15mm), these won’t mount without a bushing—OEM only fits OEM.

Should You Buy It

If you own a compatible Honda self-propelled mower and want reliable, drop-in replacement blades with no fitment guesswork, this 2-pack is a solid choice for the price. It’s best for routine maintenance or replacing dull/worn blades on a mower that sees regular use. Skip if you need mulching blades or have a different brand deck.