Caltric Deck Blade with Lock Nut Compatible with John Deere D100 D105 D110 D120 D125 D130 42" Tractor

What It Is

This is a replacement 42-inch deck blade set (usually 2 blades) with lock nuts, designed for John Deere 100-series lawn tractors. It’s for cutting grass on residential lawns, not for heavy-duty or commercial use.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 42 inches (measured blade tip to blade tip). This set fits John Deere D100, D105, D110, D120, D125, and D130 models, plus some other 100-series tractors with a 42-inch deck. Check your OEM blade part number—Caltric lists compatibility with John Deere GY00175, GY00176, GY00177, GY00178, GY00179, and GY00180. Measure your current blade length (should be about 21 inches per blade) and center hole diameter (typically 1 inch). Also verify the blade thickness—Caltric blades are often 0.25 inches thick, matching OEM spec. If your deck is 48 inches or larger, this set won’t work.

Key Things to Know

• Quality: Caltric is an aftermarket brand; blades are made of hardened steel but may not last as long as OEM John Deere blades in rocky or sandy soil. Expect 1-2 seasons of home use.
• Installation: Easy swap—remove the old blade, install new one with the included lock nut, torque to 40-50 ft-lb. Use a blade stabilizer tool to prevent spinning. The blade orientation (cutting edge facing cutting direction) matters.
• Common gotcha: The lock nuts are single-use; if you reuse old nuts, they may loosen. Always use the new ones provided.
• Balance: These blades are factory-balanced, but if you hit a rock or stump, check balance before reinstalling. An unbalanced blade causes vibration and poor cut.

Should You Buy It

If you own a John Deere D100-series with a 42-inch deck and need a budget-friendly replacement for light residential mowing, this Caltric set is a solid pick. It’s not for heavy use or commercial mowing—stick with OEM if you want longer life and tougher steel. For the price, it’s a good value for typical lawn care.