The John Deere G100 mower blade part number found is GX21784. The blade set part number found is GY20684. The deck uses 3 blades.
Blade part #GX21784
Blade set part #GY20684
Blade count3 blades
John Deere G100 Mower Blade Size and Part Numbers
Mower blade part number
GX21784
Mower blade set part number
GY20684
Number of blades
3 blades
Blade type
high-lift, mulching, standard, and bagging
John Deere G100 Blade Notes
Blade note
The John Deere G100 blade listing captured here shows single blade part number GX21784 and blade set part number GY20684. Do not buy purely from model name if the mower deck or serial range is different
Deck note
For the John Deere G100, the captured deck information is blade count 3 blades. Deck size matters because the same model family can use different blade kits
Blade type note
For the John Deere G100, blade type is listed as high-lift, mulching, standard, and bagging. Pick the blade style for the job: clean discharge, bagging lift, or mulching
Fitment note
For the John Deere G100, use the listed specs as a buying guide, but confirm against the operator manual, parts diagram or old blade before ordering
John Deere G100 Mower Blade FAQ
What is the difference between the John Deere G100 blade number and blade set number?
The captured single blade number is GX21784, while the captured blade set number is GY20684. Use the single blade number for one replacement and the set number when replacing the full deck set
Which blade type should you use on the John Deere G100?
The blade type captured is high-lift, mulching, standard, and bagging. Use that against the captured fitment value GX21784. High-lift helps bagging/discharge; mulching blades need the right mulching setup
Is the captured John Deere G100 blade part number enough to buy from?
The captured blade part number is GX21784. That helps with OEM lookup, but the blade length, width and center hole were not fully captured here. Confirm the deck or old blade before trusting an aftermarket cross-reference
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.
