The blade set part number found is GY20850. The deck uses 2 blades.
Blade set part #GY20850
Blade count2 blades
John Deere STX30 Mower Blade Size and Part Numbers
Mower blade set part number
GY20850
Number of blades
2 blades
Blade type
high-lift, mulching, bagging, and 3-in-1
John Deere STX30 Blade Notes
Blade note
The John Deere STX30 blade listing captured here shows blade set part number GY20850. Do not buy purely from model name if the mower deck or serial range is different
Deck note
For the John Deere STX30, the captured deck information is blade count 2 blades. Deck size matters because the same model family can use different blade kits
Blade type note
For the John Deere STX30, blade type is listed as high-lift, mulching, bagging, and 3-in-1. Pick the blade style for the job: clean discharge, bagging lift, or mulching
Fitment note
The blunt rule with the John Deere STX30: part number and center hole beat guesswork. A blade can be the right length and still be wrong
Official information note
Mistakes do happen. Blade specs can change by year, mower deck, spindle, serial range and regional parts catalog. Please check the operator manual, old blade stamp, deck tag and official John Deere parts catalog before ordering replacement blades.
