Kubota KX121-3S Tracks & Parts

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

Choose Your Tread

  • Directional — The excavation specialist — directional tread optimized for digging and slope work.

Kubota KX121-3S Undercarriage Parts

Pair your tracks with the right undercarriage parts for the Kubota KX121-3S:

The TrackTECH Advantage

  • 24-month warranty on every track — confidence that outlasts the competition.
  • 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.

Upgrade your Kubota KX121-3S today. Order online for free freight, or call (850) 816-7898. Need a hand matching size and guide? Try the Track Finder.

Free US Shipping100% Fit GuaranteePremium OEM Quality

Find Your Track Call TrackTECH
Directional rubber track tread pattern - installed view - image 28 - TrackTECH

Track sizes

  • 350x54.5x86

Rubber tracks

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

    In stock

    Add to quote

Which tread fits Kubota KX121-3S?

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 KX121-3S fitment data

Fitment & Part Numbers

Track Size350x54.5x86
SprocketRD118-14433
IdlerRD118-21300
RollerRD118-21700

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Frequently Asked Questions

Common fitment, shipping, and rubber track replacement questions

Will this track fit my Kubota KX121-3S?
Yes — this track is matched to the Kubota KX121-3S by size and tread pattern.
How long do Kubota KX121-3S 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.
What warranty comes with Kubota KX121-3S 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.
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.