Cat 306CR Rubber Tracks & Parts

The CAT 306CR runs a 400x72.5x76 track: 400 mm across the tread, 72.5 mm between links, 76 links around. Cut for digging, trenching, backfill and tight-quarters work and shipped free to the lower 48.

What the numbers mean on a CAT 306CR

  • 400x72.5x76 — 400 mm tread width (about 16"), 72.5 mm pitch, 76 links

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 CAT 306CR

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

CAT 306CR at a glance

  • Operating weight — 13,800 lb
  • Engine — 56 hp

Undercarriage parts for the CAT 306CR

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:

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 400x72.5x76 shows up on machines from several makers. If you run any of these alongside the CAT 306CR, 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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CAT 306CR mini excavator

Track sizes

Heavy-Duty Rubber Tracks for 306CR

  • 400x72.5Wx76 Heavy Duty Rubber Track | Block
    CAT 306CR 400x72.5x76 400x72.5Wx76
    • Heavy Duty | 400x72.5x76
    $1,800.50$1,731.25

    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 306CR Rubber Tracks & Parts fitment data

Machine Performance

Operating Weight13800 lb
Horsepower56 HP
ROC / Bucket Force14200 lb

Hydraulics & Lift

Standard Flow22 GPM
High Flow GPM33 GPM

Fitment & Part Numbers

Track Size400x72.5x76
Sprocket1
Idler2
Roller3

Shop verified-fit rubber tracks and undercarriage parts for the Cat 306CR mini excavator. Merchant-confirmed sizes on this hub: 400 x 72.5W x 76. Available tread families include Block. When more than one size applies, match the undercarriage configuration rather than guessing from model alone.

Frequently Asked Questions

What size rubber tracks fit a Cat 306CR?
The Cat 306CR can use 400x72.5x76 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.
Which tread patterns are available for the Cat 306CR?
Once the size is confirmed, choose the tread for the work the machine actually does. This Cat 306CR page currently includes Block. Use the tread pattern guide to compare traction, ride, cleanout, and wear before choosing a pattern.
Does TrackTECH carry undercarriage parts for the Cat 306CR?
Yes. When a matched part is available, this Cat 306CR hub can show the drive sprocket, front or rear idlers, and rollers alongside the tracks. If you're replacing tracks, inspect the undercarriage at the same time—worn sprockets or rollers can shorten the life of a new set. You can also browse undercarriage parts.
Do Cat 306CR tracks ship free?
Qualifying in-stock rubber track orders ship free by LTL to the lower 48. Same-day dispatch is available on qualifying in-stock orders placed before 12 PM CT; the actual delivery window depends on the exact item and ZIP code. See the shipping policy for details.
What warranty applies to TrackTECH rubber tracks?
TrackTECH rubber tracks on this hub are covered by the published 24-month / 1,500-hour warranty. Keep your proof of purchase and make sure fitment is confirmed before installation. See the warranty terms for coverage and claim requirements.