Replacement rubber tracks for the Case CX75SR mini excavator in 450x81Nx76 — 450 mm wide, 81 mm pitch, 76 links. Built for digging, trenching, backfill and tight-quarters work, with free freight to the lower 48.
What the numbers mean on a Case CX75SR
- 450x81Nx76 — 450 mm tread width (about 18"), 81 mm pitch, 76 links, narrow 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 Case CX75SR
Size gets the track on the machine; tread decides how it works and how long it lasts. What we stock for this one:
- Directional — digging, trenching and slope work. The standard excavator tread
Parts we carry for the Case CX75SR
Tracks. Call for anything not shown online — we can usually source 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 450x81Nx76 shows up on machines from several makers. If you run any of these alongside the Case CX75SR, it is the same belt:
- Case CX75C
- Case CX80
- E 70SR
- E 80
- E 80BMSR
- E 80MSR
- Hitachi ZX75US-3
- Hyundai ROBEX80CR-9A
- Kobelco SK70SR
- Kobelco SK70SR-1E
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.
