Komatsu PC40MRX Tracks & Parts

High-grade Komatsu PC40MRX rubber tracks and undercarriage parts, engineered to ment in 400x72.5Nx72. Heavy-duty construction for digging, grading and trenching — every order ships free.

Choose Your Tread

  • Directional — Mini-excavator standard — angled lugs for digging, grading and trenching traction.

Komatsu PC40MRX Undercarriage Parts

Complete the rebuild with matched-fit components for the Komatsu PC40MRX:

Tracks That Cross Over

Looking for another machine? The 400x72.5Nx72 size also fits:

Why TrackTECH

  • Continuous steel cord — up to 40% stronger than typical aftermarket tracks, resisting stretch and de-tracking.
  • Premium virgin rubber — anti-chunk compound built for long service life in abrasive conditions.
  • Drop-forged steel links for strength where the track meets the drive system.
  • 24-month warranty on every track — confidence that outlasts the competition.

Ready to roll? Buy your Komatsu PC40MRX undercarriage online now — or reach a track specialist at (850) 816-7898. Use the Track Finder to confirm the right build.

Free US Shipping100% Fit GuaranteePremium OEM Quality

Find Your Track Call TrackTECH
Komatsu PC40MRX Tracks & Parts — TrackTECH rubber tracks & undercarriage parts

Track sizes

Rubber tracks

  • heavy duty 400x72 5nx70 directional 01 hero
    Komatsu PC40MRX 400x72.5Kx72 All-Terrain
    • Heavy Duty | 400x72.5Kx72
    • All-Terrain Grip
    • Smooth Ride
    • Cut Resistant
    $1,599.00

    In stock

    Add to quote

Which tread fits Komatsu PC40MRX?

Pick a tread for your jobsite — then buy above.
+ Recommended surface- Not the primary use— Application dependent
PatternBest UseKey TraitsRoadClayGravelMulchMudTurfAction
A All-terrainMachine-matched track option Available for this machine from the governed TrackTECH fitment record. Review the track option above for current price and availability.
  • Governed Fitment
  • Machine-Matched
  • Current Commerce Data
——————View

Built for Heavy Duty Use

Heavy-Duty Track Construction

Setting a new standard in heavy-duty performance. Find your exact fit, reduce avoidable downtime, and keep your machine working — not waiting.

  • Brand New

    New belts — not remills or retreads.

  • Heavy-Duty Steel Guides

    Precision-formed internal steel components support consistent sprocket engagement.

  • Continuous Steel Cord

    Continuous internal steel reinforcement supports belt strength under repeated load.

  • Premium Wear-Resistant Rubber

    Heavy-duty rubber construction built for abrasion and daily commercial use.

  • Precision Fitment

    Governed width, pitch, and link count for the machine application.

  • High-Traction, Low-Vibration

    Tread patterns matched to the jobsite.

Komatsu PC40MRX fitment data

Fitment & Part Numbers

Track Size400x72.5Nx72
Idler9237507

Related Collections

Frequently Asked Questions

Common fitment, shipping, and rubber track replacement questions

Will this track fit my Komatsu PC40MRX?
Yes — this track is matched to the Komatsu PC40MRX by size and tread pattern.
How long do Komatsu PC40MRX rubber tracks last?
Most rubber tracks last 1,200–1,600 operating hours depending on terrain, alignment, and tension. Keeping tracks tensioned and clearing debris daily extends life.
How fast will my track ship?
In-stock tracks ship fast from US warehouses, most within 1–2 business days, with tracking sent as soon as it leaves the dock.