21" Mower High-Lift Blade for LM2110/LM2110SP/LM2120SP

What It Is

This is a 21-inch high-lift lawn mower blade designed specifically for the Ariens/Stens LM2110, LM2110SP, and LM2120SP self-propelled mowers. The high-lift profile creates stronger upward airflow, improving grass clipping discharge into the bag or side chute, making it ideal for thick or damp grass.

Fitment & Compatibility

Before buying, confirm these three things:

• Deck size: Only fits mowers with a 21-inch cutting deck. Measure your blade length (from tip to tip) to verify.
• Model check: This blade is listed for LM2110, LM2110SP, and LM2120SP. Cross-reference your mower’s model number on the deck or under the seat.
• Measurements: Center hole diameter must match your spindle—typically 1-inch round or 5-point star. Check your OEM blade’s hole shape. Overall length should be exactly 21 inches from tip to tip.
• OEM vs aftermarket: This is an aftermarket replacement. It may not match OEM blade weight or balance exactly, so you’ll need to balance it after installation.

Key Things to Buy

• Quality: High-lift blades can be louder and require more engine power than standard blades. Expect slightly reduced runtime on battery models.
• Installation: Easy—just a single bolt per blade. Use a torque wrench to 30-40 ft-lbs, and always install with lift wings pointing up toward the deck.
• Common gotcha: High-lift blades can cause excessive vibration if not properly balanced. Always use a blade balancer after installation. Also, they may clog more easily in very wet, heavy grass because of the aggressive lift.
• Safety: Disconnect spark plug and drain fuel before flipping the mower. Wear gloves—blade edges are sharp.

Should You Buy It

If you frequently bag or discharge clippings on thicker or damp grass and want better suction than a standard blade, this high-lift blade is a worthwhile upgrade. It’s not ideal for mulching or dry, sparse lawns where a standard or mulching blade would work better. For the price, it’s a solid aftermarket choice if you confirm fitment and balance it properly.