Replacement Lawn Mower Blade Kit (72531-VH7-000 + 72511-VH7-000) - Compatiable with HRX217 HRX217K1 HRX217K2-21" MicroCut Twin Blade Set

What It Is

This is a MicroCut twin blade set (part numbers 72531-VH7-000 and 72511-VH7-000) for Honda HRX217 walk-behind mowers with 21-inch decks. It replaces the two stacked blades that work together to create finer clippings and better bagging performance than a single blade.

Fitment & Compatibility

Before buying, check that your mower is one of these Honda models: HRX217, HRX217K1, HRX217K2, HRX217K3, HRX217K4, HRX217K5, HRX217K6, HRX217K7, HRX217K8, or HRX217K9. The deck must be exactly 21 inches. This set is aftermarket (not OEM Honda) but matches the original blade dimensions—do not use on HRX217 with 20-inch decks or on any non-HRX Honda models. Measure your existing blades: each should be roughly 21 inches long with a star-shaped center hole. If your mower has a single blade, this twin set will not fit.

Key Things to Know

• Quality vs OEM: Aftermarket blades are often thinner and may dull faster than Honda genuine parts. Expect 1–2 seasons of normal use before replacement, depending on lawn conditions.
• Installation difficulty: Moderate. You’ll need a socket wrench (typically 14mm or 15mm) and a block of wood to jam the blade. The two blades must be stacked correctly—the lower blade has a different offset—so note orientation before removing old ones.
• Common gotcha: Torque the center bolt to 35–45 ft-lbs. Under-tightening can cause blade slip; over-tightening can strip the adapter. Use a torque wrench if you have one.
• Balance check: Aftermarket blades sometimes come unbalanced. Spin each blade on a nail or balancer before mounting. An unbalanced blade will vibrate the mower and stress the engine shaft.

Should You Buy It

If you own a compatible Honda HRX217 and want to save roughly $15–20 vs OEM blades, this set is a solid value. It’s best for homeowners with average-sized lawns who don’t mind replacing blades annually. If you mow heavy, sandy, or rocky terrain, or want maximum longevity, stick with Honda genuine blades.