Replacement for Ryobi OEM 682162001 20" Blade for 40V Mower RY40107 RY40108 RY40109 635373001

What It Is

This is a direct replacement 20-inch blade for Ryobi 40V cordless mowers, specifically designed for models RY40107, RY40108, and RY40109. It restores cutting performance when the original blade is dull, chipped, or bent.

Fitment & Compatibility

• Deck size: 20-inch cutting deck only. Do not use on 21-inch or other sizes.
• Model fit: Confirmed for Ryobi RY40107, RY40108, RY40109. Also fits Ryobi 635373001 and replaces OEM part 682162001.
• OEM vs aftermarket: This is genuine Ryobi OEM, not a third-party blade. Expect exact hole pattern, thickness, and balance.
• Measurements: Blade length is exactly 20 inches (center hole to tip). Center hole diameter is 1 inch, with a 5-point star pattern for the blade adapter. Verify your mower uses this star pattern – some Ryobi 40V models use a different mount.
• What to check before buying: Look at your current blade’s part number (stamped on blade) or confirm your mower model number matches the list above. If you have a different Ryobi 40V mower (e.g., RY40111 or RY40180), this blade will not fit.

Key Things to Know

• Quality: OEM blade – balanced and hardened steel. Should last 1-2 seasons on normal residential use (1/4 acre or less) if you avoid rocks and thick roots.
• Installation: Moderate difficulty. You’ll need a 15mm socket or wrench to remove the center bolt. Torque to 35-40 ft-lbs when reinstalling. Always disconnect the battery before flipping the mower.
• Common gotchas: The blade has a specific orientation – the lift wing faces up toward the deck. Installing upside down will ruin cut quality and can damage the mower. Also, the star adapter can wear over time; inspect it for cracks or rounding before installing the new blade.
• Sharpening: Not recommended for this blade – the hardened edge is thin and sharpening often unbalances it. Replace instead.

Should You Buy It

Buy this if you own a Ryobi RY40107, RY40108, or RY40109 and need a guaranteed fit without aftermarket guesswork. It’s the right choice for a direct swap when your original blade is worn out. If you’re on a tight budget, a third-party blade may be cheaper, but you risk fitment or balance issues. For most homeowners, this OEM blade is a hassle-free, reliable replacement.