John Deere 50ZTS tracks and undercarriage, sized 400x72.5Wx72 (400 mm wide × 72.5 mm pitch × 72 links). Made for digging, trenching, backfill and tight-quarters work. Free freight, 24-month warranty.
What the numbers mean on a John Deere 50ZTS
- 400x72.5Wx72 — 400 mm tread width (about 16"), 72.5 mm pitch, 72 links, wide guide lugs
Width is the tread face, pitch is the distance between drive lugs, and links is the count around the loop. All three have to match — a track one link off will not tension correctly no matter how close the width is.
Tread choice for the John Deere 50ZTS
Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:
- Staggered Block — mixed dirt and gravel. Block stability with better cleanout than a straight block
- MX — mixed and hard surfaces. A durable general-duty excavator tread
If the machine splits its time between surfaces, buy for the ground you are on most — a hard-surface tread on constant mud will spin, and a bar tread on concrete will wear out in half the hours.
Undercarriage parts for the John Deere 50ZTS
Rollers, idlers and sprockets wear on the same clock as the track. Fitting new rubber over a hooked sprocket or a seized roller is the fastest way to lose the new track — check these while the tracks are off:
- Drive sprocket — 2050708
- Bottom roller — 4357785
- Carrier roller — RD411-22900, 4392416
Where more than one part number is listed, John Deere changed that component across serial ranges. Match the number stamped on the part you are replacing, or send us the machine serial and we will pick it.
How these wear
Excavator undercarriages load one side hard on slew and travel, so link cracking usually shows up before the tread wears out. Replace in pairs where you can: a new track running against a stretched one loads the drive unevenly and you will feel it in the steering.
Same track, other machines
Track size follows undercarriage geometry, not brand, so 400x72.5Wx72 shows up on machines from several makers. If you run any of these alongside the John Deere 50ZTS, it is the same belt:
Not sure which you are running? Read the size off the inside of the old track, or call (850) 816-7898 and we will pull it off the machine record. The Track Finder works by make and model too.
