the blades are used too much and wear out more quickly and need to be replaced. There are 2 kinds of blades on the market. one of the other OEM parts produced by the original John Deere. I’ve added one of the first gauge OEMs and one informative customer review below. the other is the original piece and its own interpretation.
Rotary 12920 lawn mower blade for John Deere models L120 l130 replaces OEM gx20250 gx20819 Requires 3 for 48 deck
Rotary® fits 12920 lawnmower blade for John Deere models L120 l130 and replaces OEM gx20250 gx20819. 3 blades are required for the 121.9 cm deck mower. This blade is 43.2 cm x 2-1 / 5.1 x 0.5 cm with a 11 / 40.6 cm center hole diameter. This blade has a lift of 1-3 / 40.6 cm and measures 3-11 / 40.6 cm center to center.
Rotary® 12920 Lawn Mower is suitable for John Deere TM L120 l130 models
3 blade deck required for lawn mower
Replaces OEM gx20250 gx20819
Length: 43.2 cm
Width: 2-1 / 5.1 cm
Thickness: 0.5 cm
1-3 / 40.6 cm Lift
11 / 40.6 cm center hole diameter
3-11 / 40.6 cm center to center
OEM customer review;
These blades don’t seem to mulch as well as the OE John Deere blades, and they have gone dull fairly quickly. I’m noticing more tearing of the grass than I used to get with the Deere blades — I’ll probably go back to a new set of John Deere blades at the start of the next mowing season.
original part customer review;
Fit perfectly does a wonderful job
I add a video about how you should change it.