Kubota KX121-3ST Tracks & Parts

High-grade Kubota KX121-3ST rubber tracks and undercarriage parts, engineered to ment in . Heavy-duty construction for digging, grading and trenching — every order ships free.

Specifications at a Glance

  • Track size:
  • Width: 350 mm
  • Pitch: 54.5 mm
  • Links: 86

Tread Patterns

  • Directional — Angled directional lugs purpose-built for excavation, grading and trenching.

Matched Undercarriage Components

Complete the rebuild with matched-fit components for the Kubota KX121-3ST:

Built to Outlast OEM

  • Precision OEM alignment — a reinforced roller path keeps running smooth and vibration low.
  • Endless high-tensile cables — single-cure construction with no weak splice point.
  • Continuous steel cord — up to 40% stronger than typical aftermarket tracks, resisting stretch and de-tracking.
  • Drop-forged steel links for strength where the track meets the drive system.

Ready to roll? Buy your Kubota KX121-3ST 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
Kubota KX121-3ST Tracks & Parts — TrackTECH rubber tracks & undercarriage parts

Track sizes

  • 350x54.5x86

Rubber tracks

  • 350x54.5Nx86 Rubber Track Directional replacement rubber track for compact construction equipment
    Kubota KX121-3ST 350x54.5Kx86 Non-Directional
    • Heavy Duty | 350x54.5Kx86
    $1,521.45$1,319.00

    In stock

    Add to quote

Which tread fits Kubota KX121-3ST?

Pick a tread for your jobsite — then buy above.
+ Recommended surface- Not the primary use— Application dependent
PatternBest UseKey TraitsRoadClayGravelMulchMudTurfAction
N NdMachine-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.

Kubota KX121-3ST fitment data

Fitment & Part Numbers

Track Size350x54.5x86
SprocketRD118-14433
RollerRD118-21700

Related Collections

Frequently Asked Questions

Common fitment, shipping, and rubber track replacement questions

Will this track fit my Kubota KX121-3ST?
Yes — this track is matched to the Kubota KX121-3ST by size and tread pattern.
How long do Kubota KX121-3ST 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.
Do Kubota KX121-3ST tracks sell in pairs?
Tracks are priced individually; a full machine needs two. Most owners replace both at once so wear stays even.
What warranty comes with Kubota KX121-3ST tracks?
Our rubber tracks carry a 24-month warranty against manufacturing defects, with continuous steel cords and wear-resistant compounds. Technicians by trade; heavy duty comes standard.