42 inch Mower Blades for John Deere D110 D130 D105 D125 X300 Z225 LA135 Z235 Replace AM141034 AM137327 AM141032

What It Is

This is a set of aftermarket 42-inch mower blades designed to replace OEM part numbers AM141034, AM137327, and AM141032. They fit a range of John Deere lawn tractors and zero-turn mowers, including the D100 series, X300, Z200, and LA100/200 series, for standard mulching or bagging.

Fitment & Compatibility

Before buying, confirm your deck is exactly 42 inches (measured blade tip to tip). These blades fit John Deere models: D110, D130, D105, D125, X300, Z225, LA135, Z235, and others using the same OEM part numbers. Check your owner’s manual or existing blade for the part number (stamped on the blade). Aftermarket blades may have slight differences in thickness or coating—verify center hole size (usually 1 inch) and overall length (21 inches for 42-inch decks). Do not assume they fit all 42-inch decks; some John Deere models (e.g., LX series) use different patterns.

Key Things to Know

• Installation: Moderate difficulty—requires lifting the mower safely, removing the blade bolt (often 5/8 or 3/4 inch), and torquing to 70-90 ft-lbs. Use a blade removal tool or block of wood to prevent spinning.
• Quality: Most aftermarket blades are made from hardened steel but may be thinner than OEM. Check for balanced sets; unbalanced blades cause vibration and uneven cuts.
• Gotchas: These are not universal—double-check that your deck uses a single-center hole design (not offset or multi-hole). Also, aftermarket blades may not have the same lift or air flow for thick grass; test on a small area first.
• Maintenance: Replace blades every 25-30 hours of mowing or once per season. Sharpen only if nicked; replace if bent or cracked.

Should You Buy It

If you need a budget-friendly replacement for a 42-inch John Deere deck and your model is listed, these blades offer good value for the price. They’re best for light-to-moderate mowing (lawns, not rough terrain). For heavy use, commercial-grade, or precise mulching, consider OEM or thicker aftermarket options. Verify fitment before ordering to avoid returns.