Lawn Mower Blade 19.21" Replacement for RYOBI 40V 20-Inch Mower RY401011 RY401012 RY40108 RY40109, Replaces OEM 682162001 635373001 AC04020, Round Center Hole 2 Pack

What It Is

This is a 2-pack of 19.21-inch replacement blades designed for RYOBI 40V 20-inch cordless mowers. It’s intended for mulching or bagging grass on residential lawns, fitting select RYOBI models with a round center hole.

Fitment & Compatibility

Before buying, confirm your mower’s deck size is exactly 20 inches (not 21 or 22) and that the blade length is 19.21 inches. This set explicitly fits RYOBI models RY401011, RY401012, RY40108, and RY40109. It replaces OEM part numbers 682162001, 635373001, and AC04020. The center hole is round—measure yours to ensure it matches (typically 1 inch). Verify your mower uses a 2-blade system; some RYOBI 20-inch models use a single blade. Check the blade’s thickness and offset (curved vs. flat) against your original.

Key Things to Know

• Quality concerns: With only 4 reviews and a 3.3 rating, reports of premature dulling or imbalance are possible. Inspect for burrs or warping before installation.
• Installation difficulty: Easy—requires a socket wrench and blade removal tool (or block wood). Torque bolts to 30-40 ft-lbs. Mark blade orientation (sharp edge forward) to avoid spin direction errors.
• Common gotcha: The 19.21-inch length is precise; using it on a slightly wider deck can cause binding or poor cut. Always measure your old blade first.
• Aftermarket vs. OEM: This is a non-RYOBI branded part. Expect potential fit or performance differences from genuine RYOBI blades, especially in edge hardness.

Should You Buy It

Buy this if you own one of the listed RYOBI 40V models and need a budget-friendly 2-pack for quick swaps. Skip it if you prioritize long blade life or consistent cut quality—consider OEM blades instead.