C-Block Tracks
C-block rubber tracks built for dependable traction, durability, and daily performance across dirt, gravel, clay, and mixed construction jobsite conditions.
High-grade Kubota KX121-3S rubber tracks and undercarriage parts, engineered to OEM fitment 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:
- Drive Sprocket — OEM Part #RD118-14433
- Front Idler — OEM Part #RD118-21300
- Top Roller — OEM Part #RD411-22900
- Bottom Roller — OEM Part #RD118-21700
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.
Direct Replacement Rubber Tracks for the Kubota KX121-3S
Direct replacement rubber tracks for the Kubota KX121-3S are built for heavy-duty compact equipment applications where traction, stability, and uptime matter. These tracks are designed for dependable grip, smooth travel, and consistent performance across dirt, clay, gravel, demolition debris, utility work, grading, land clearing, excavation, and mixed jobsite terrain.
Heavy-Duty Construction for Daily Work
Premium virgin rubber compounds help resist tearing, chunking, cracking, dry rot, and premature tread wear under demanding field conditions. Continuous steel cord reinforcement adds internal strength, helps reduce stretching, and supports stable track performance through repeated turning, travel, and loading.
OEM Fit Guarantee
Machine-specific sizing, steel link spacing, and guide lug geometry are built for proper undercarriage engagement on the Kubota KX121-3S. Precision-aligned fitment helps support smooth travel, stable tracking, reduced vibration, and reliable sprocket contact.
Built to Protect the Undercarriage System
A well-built rubber track helps improve machine control while limiting unnecessary stress on rollers, idlers, and sprockets. For contractors running Kubota equipment, that means better ride quality, stronger traction, less downtime, and better value over the life of the track.
Frequently Asked Questions
What size rubber track does the Kubota KX121-3S use?
The Kubota KX121-3S uses a 350x54.5x86 rubber track. Always confirm against your current track or the machine's spec plate, since some units shipped with more than one option.
Will this track fit my Kubota KX121-3S?
Yes — this track is matched to the Kubota KX121-3S by size and tread pattern. If your machine has a serial break or factory option, send the serial number and we'll verify fitment before shipping.
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.
