RY40100 16" Lawn Mower Blade for Ryboi Lawn Mowers 16" Replace AC04154-2Pcs

What It Is

This is a 16-inch replacement blade set (2-pack) designed for Ryobi 16-inch electric lawn mowers. It’s a direct aftermarket alternative to the OEM Ryobi AC04154 blade, intended for mulching and standard cutting on smaller residential lawns.

Fitment & Compatibility

Before buying, confirm these three things:

• Deck size: This blade fits only 16-inch cutting decks. Measure your mower deck width (blade tip to blade tip) to be sure.
• Model compatibility: Works with Ryobi 16V/40V brushless mowers like RY40100, RY40180, RY40190, and RY401150. Also fits older models using AC04154 OEM blades.
• Center hole & mounting: The blade center hole is 1-inch diameter with a 5-point star pattern. Check your mower’s blade adapter matches this shape—most Ryobi 16-inch models do, but verify visually.

If your mower is a different brand or deck size, this won’t fit.

Key Things to Know

• Quality: Aftermarket steel, sharp out of the box. Not as thick as OEM, but adequate for light-to-medium duty. Expect shorter lifespan if you hit rocks or roots.
• Installation: Easy—remove the single bolt (usually 15mm or 9/16″), swap blades, torque to 35–40 ft-lbs. Use a blade stop or block wood to keep the blade from spinning.
• Common gotcha: The star pattern must align perfectly with the adapter. If it’s off, the blade won’t sit flat, causing vibration and poor cut. Double-check orientation before tightening.
• Balance: Each blade is pre-balanced, but always spin-test after installation. If the mower shakes, re-check seating or swap blades.

Should You Buy It

If you own a Ryobi 16-inch mower and need a budget-friendly replacement for light residential use, this is a solid buy. The 2-pack gives you a spare, and the price is lower than OEM. However, if you mow thick, wet grass or have a rough yard with debris, consider OEM blades for longer durability.