AM100946 Low-Lift 38-Inch Mower Blades Replacement for John Deere, Replaces M82408 050536, Compatible with LT155 LX172 STX38 GT235, 2-Pack

What It Is

The AM100946 is a 2-pack of low-lift 38-inch mower blades designed for John Deere lawn tractors and zero-turn mowers. Low-lift blades are ideal for dry, light grass cutting and bagging—they produce less lift than high-lift blades, reducing dust and improving discharge in mulching or bagging setups.

Fitment & Compatibility

Before buying, confirm three things:

• Deck size: These blades are for 38-inch cutting decks only. Measure your deck width—do not assume from model name.
• Model compatibility: They fit John Deere LT155, LX172, STX38, GT235, and others using OEM part M82408 or 050536. Check your owner’s manual or current blade part number.
• Measurements: Center hole diameter is 7/8-inch (common on Deere). Blade length is 19.75 inches (each). Verify your spindle pattern—some newer Deere decks use a 5-point star pattern; these use a standard round hole.

Aftermarket blades like AM100946 are direct replacements but may have slightly different steel thickness or balance. Always compare old vs. new side-by-side.

Key Things to Know

• Low-lift trade-off: Less lift means less vacuum for wet or tall grass. If your deck clogs frequently, consider high-lift blades instead.
• Installation torque: Tighten blade bolts to 40–50 ft-lbs. Over-tightening can strip the spindle; under-tightening can cause blade ejection.
• Balance check: Even new blades can be slightly off. Use a blade balancer before installing to avoid vibration and spindle wear.
• Sharpening: These blades are hardened but can be sharpened 2–3 times before replacement. Never sharpen beyond the factory edge profile.

Should You Buy It

If you own a compatible John Deere with a 38-inch deck and primarily cut dry, light grass with bagging or mulching, this 2-pack offers solid value at $26.99. It’s not for wet, heavy cutting or decks larger/smaller than 38 inches. For the price, it’s a reliable aftermarket alternative to OEM blades.