Lawn Mower Blades High Lift Blade with 38 inch Decks Fits for AM100945 AM137324 AM100991 M153118 M84472 for John Deere STX38 LX172 LX173 LX176 LX178 STX30 GT242 Sabre 1538H, 2 PCS

What It Is

This is a set of two high-lift replacement blades designed for 38-inch cutting decks on select John Deere and Sabre lawn tractors. The high-lift profile creates stronger airflow for better grass discharge and bagging performance, ideal for thick or damp grass where standard blades struggle.

Fitment & Compatibility

Before buying, verify these three things:

1. Deck size: These blades fit only 38-inch decks. Measure your deck width or check your model number (e.g., STX38, LX172).
2. OEM cross-reference: These match John Deere OEM parts AM100945, AM137324, AM100991, M153118, and M84472. If your mower uses any of these, they’re a direct swap.
3. Model list: Confirmed fit for John Deere STX38, LX172, LX173, LX176, LX178, STX30, GT242, and Sabre 1538H. Double-check your model’s deck size and spindle pattern—some older or non-standard decks may differ.
4. Measurements: Each blade is roughly 18.5 inches long with a 5-point star center hole and 1-inch diameter. Measure your old blade’s length, center hole shape, and thickness to confirm.

Key Things to Know

• Installation difficulty: Easy for DIYers—just a socket wrench and jack stands. Remove the old blade, install new one with cutting edge facing upward, and torque to 30-40 ft-lbs.
• High-lift vs. standard: These blades create more lift but also more drag, which can slightly reduce engine RPM or fuel efficiency on smaller tractors. Not ideal for mulching—use dedicated mulching blades for that.
• Common gotcha: Always check blade balance after installation. An unbalanced blade causes vibration, cuts unevenly, and wears spindle bearings. Use a blade balancer ($10-15) or a simple nail-in-wall trick.
• Durability: Aftermarket blades are often thinner than OEM. Inspect for bending after hitting rocks or roots. Replace if bent or nicked.

Should You Buy It

Buy this if you own a compatible 38-inch John Deere or Sabre tractor and need reliable replacement blades for bagging or side-discharge mowing in heavy grass. The high price is fair for the lift performance, but skip it if you primarily mulch—standard or mulching blades will serve you better.