Caltric GX21380 GY20684 GY20679 Mower Deck Blade Compatible with John Deere 190C D170 LA150 LA175 E180 G110 S180 Tractor

What It Is

This Caltric blade set is an aftermarket replacement for John Deere lawn tractors, designed to cut grass efficiently on mid-size residential decks. It matches OEM part numbers GX21380, GY20684, and GY20679, and fits a range of popular Deere models.

Fitment & Compatibility

Before buying, verify your mower’s deck size and blade length. This set typically fits 42-inch and 48-inch decks—common on models like the LA150, LA175, D170, E180, G110, S180, and 190C. Measure your current blade’s length (usually 20.5 inches for these decks) and check that the center hole diameter and offset match. Caltric blades are aftermarket, not OEM, so confirm the part number cross-references with your original. Also ensure your spindle bolt pattern is compatible (most use a 5-point star or 6-point star drive).

Key Things to Know

• Quality: Made from 10-gauge steel (thicker than some OEM blades) with a hardened edge. Should hold up well for residential use, but may not match OEM sharpness out of the box.
• Installation: Easy if you have a socket set and jack stands. Use a blade removal tool to prevent spinning. Torque bolts to 40-50 ft-lbs. Check for balance after mounting.
• Common gotchas: Blades may arrive slightly duller than OEM—sharpen before first use. Also, verify that the offset (lift) is correct for your deck; mismatched lift can cause poor discharge or scalping.
• Price vs. value: At $44, it’s cheaper than a single OEM blade set. Two reviews are a thin sample, but the 5.0 rating suggests no major issues.

Should You Buy It

If you have a compatible John Deere model and want a budget-friendly replacement that matches OEM specs, this Caltric set is a solid choice. It’s best for residential mowing—not for commercial use or high-volume cutting. Just double-check measurements and sharpen before installing.