SummerCool AC04020 2 Pack Mower Blades Replace for Ryobi 20 Inch 40V Brushless Mowers,20" Lawn Mower Blade Compatible with Ryobi RY40180, RY40190, RY401110, RY401120 Mowers

What It Is

This is a 2-pack of 20-inch replacement blades designed specifically for Ryobi 40V brushless mowers. They are a drop-in aftermarket alternative to OEM blades for mulching and bagging on cordless electric mowers.

Fitment & Compatibility

Check these before buying:

• Deck size: Must be a 20-inch cutting deck. Measure your mower deck width to confirm.
• Model compatibility: Fits Ryobi RY40180, RY40190, RY401110, and RY401120 only. Not for other Ryobi 20-inch mowers (e.g., older 40V or gas models).
• OEM vs aftermarket: These are third-party blades. If you want exact OEM fit, buy Ryobi part # 316736001. Aftermarket may have slight thickness or hole alignment differences.
• Measurements: Blade length 20", center hole diameter typically 1" (verify on your old blade). Check blade thickness – aftermarket may be slightly thinner, affecting balance.
• Hardware included: No. Reuse your existing bolts/nuts or buy new ones separately.

Key Things to Know

• Installation difficulty: Easy – 20 minutes with a socket wrench and blade removal tool. Use a torque wrench to tighten to 30-40 ft-lbs.
• Balance: Aftermarket blades sometimes arrive unbalanced. Check by hanging on a nail – if one side dips, file the heavy side lightly.
• Sharpness: Factory edge may be duller than OEM. Consider sharpening before first use.
• Durability: Multiple user reports of blades bending or chipping on rocks/roots. Avoid thick debris. For clean lawns, they last 1-2 seasons.

Should You Buy It

Buy these if you have a compatible Ryobi 40V brushless mower, want a budget-friendly 2-pack, and don’t mind checking balance and sharpening. Skip them if you mow rocky or debris-heavy lawns, prefer guaranteed OEM fit, or need thicker blades for heavy use.