UDC Parts GY20852 Mower Blades 48 Inch Replacement for John Deere D140 E140 S140 Z355E GX21786 GX21784 S170 E170 LA130 LA145 D160 S160 E160 E150 GX21785 AM137757 AM141035 / High Lift Mulching 3 Pack

What It Is

This is a 3-pack of 48-inch high-lift mulching blades, designed to replace OEM blades on a range of John Deere lawn tractors and zero-turn mowers. The high-lift design improves grass clipping discharge and bagging performance, while the mulching edge helps chop clippings finer for better lawn feeding.

Fitment & Compatibility

Before buying, confirm your mower has a 48-inch cutting deck (not 42 or 54 inch). This set fits John Deere models including D140, E140, S140, Z355E, S170, E170, LA130, LA145, D160, S160, E160, E150, and many others using OEM part numbers GX21786, GX21784, GX21785, AM137757, or AM141035. Measure your existing blade length (48 inches across) and center hole diameter (usually 1 inch) to be sure. These are direct replacements for the OEM parts listed—no adapter or modification needed.

Key Things to Know

• High-lift vs standard: These blades generate more upward airflow, which helps bagging and side-discharge but can increase engine load slightly. Not ideal for very tall or wet grass.
• Installation: Simple DIY job with a socket wrench and blade removal tool—torque blade bolts to 70-80 ft-lbs per John Deere specs. Use thread locker for safety.
• Quality: UDC blades are made from heat-treated steel, comparable to OEM. Some users report slightly thinner material than OEM, but still durable for residential use.
• Mulching performance: The mulching wing on each blade works well for light to moderate grass; heavy mulching may require slower mowing speed.

Should You Buy It

This is a solid budget-friendly choice for John Deere owners with a 48-inch deck who want reliable mulching and bagging performance without paying OEM prices. It’s best for residential mowing on flat to moderate terrain—skip it if you need extreme durability for commercial use or mow very tall, wet grass regularly.