Cat 308 Rubber Tracks & Parts

The CAT 308 takes a 450 mm track, but it was built with more than one pitch — 71 and 81 mm. Same width, different drive-lug spacing, and they do not swap. Check the old track or the sprocket before ordering. Free freight to the lower 48, 24-month warranty.

CAT 308 track options

  • 450x71x86 — 450 mm (18") wide, 71 mm pitch, 86 links
  • 450x81x78 — 450 mm (18") wide, 81 mm pitch, 78 links

Same tread width on all of them — what changes is pitch and link count, which is set by the sprocket and roller frame. Read the numbers off the inside of the old track rather than going by model year; these were built across more than one undercarriage spec.

Tread choice for the CAT 308

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

Undercarriage parts for the CAT 308

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:

Where more than one part number is listed, CAT 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 one of these sizes shows up on machines from several makers. If you run any of these alongside the CAT 308, 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.

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Track sizes

Heavy-Duty Rubber Tracks for 308

  • 450x71x86 Heavy Duty Rubber Track | Directional
    CAT 308 450x71x86 450x71x86
    • Heavy Duty | 450x71x86
    $2,307.50$2,218.75

    In stock

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  • 100% Virgin Rubber

    Engineered to resist chunking, tearing, and cutting in harsh, abrasive environments.

  • Continuous Steel Cords

    Jointless internal cable architecture eliminates structural weak points and maximizes overall tensile strength.

  • Drop-Forged Links

    Precision heat-treated guide lugs ensure exact sprocket engagement and prevent de-tracking under heavy side-loads.

  • Corrosion Resistant

    The internal steel framework is fully encapsulated to prevent oxidation, rust, and moisture penetration.

  • Reinforced Sidewalls

    Extra-thick vulcanized rubber and tapered edge profiles protect against curb slashing and lateral impacts from jobsite debris.

  • Low-Vibration Tread

    Optimized lug spacing and pitch geometry absorb shock, reducing undercarriage wear and minimizing cabin vibration.

Cat 308 Rubber Tracks & Parts fitment data

Fitment & Part Numbers

Track Size450x71x86
Roller1

Verified-fit rubber tracks and undercarriage parts for the Cat 308. Confirm size and tread before ordering.

Frequently Asked Questions

What size rubber tracks fit a Cat 308?
The Cat 308 can use 450x71x86 rubber tracks. Match the full size on the track you are replacing before you order. If your machine has more than one track setup, choose the width and guide style that matches the track currently on the machine.