The Kubota KX040-4 is not a one-size-by-model application in TrackTECH's current governed fitment data. Two rubber-track configurations are cataloged and release-ready: 350x52.5x86 and 350x54.5x86.
Both are 350mm wide and have 86 links, but the pitch is different. That means they are not interchangeable. Match the size molded into the track already on your machine, or verify the machine configuration before ordering.
Kubota KX040-4 Track Size
| cataloged configuration | Status | What to Do |
|---|---|---|
| 350x52.5x86 | cataloged, release-ready | |
| 350x54.5x86 | cataloged, release-ready |
TrackTECH's governed records do not currently use the model name alone to decide between these two configurations. The existing track marking is the cleanest first check.
Why 52.5mm vs. 54.5mm Pitch Matters
Pitch is the center-to-center spacing of the internal drive engagement points. A 52.5mm-pitch track will not correctly engage an undercarriage designed around 54.5mm pitch, even when width and link count are identical.
This is exactly why matching only the first and third numbers—350mm wide and 86 links—is not enough. For more detail, see why same-length tracks are not always interchangeable.
KX040-4 Track Options
- Read the molded track size. Look on the inside or sidewall of the existing rubber for 350x52.5x86 or 350x54.5x86.
- Do not infer pitch from width. Both cataloged configurations are 350mm wide.
- Do not substitute a different guide designation from an old catalog listing. Match the physical machine and current track rather than relying on an unsupported suffix.
- If the marking is missing, verify the machine. Use the Track Finder or contact TrackTECH before ordering.
What to Inspect During Track Replacement
- Sprocket wear and engagement
- Idler flange condition and side play
- Bottom and carrier rollers for leaks or binding
- Track alignment and final tension to the machine service specification
A worn undercarriage can shorten the life of a correct new track, so use the replacement as an inspection point for the full running gear.
Frequently Asked Questions
What size track does a Kubota KX040-4 use?
TrackTECH currently has two cataloged, release-ready configurations: 350x52.5x86 and 350x54.5x86. configuration-specific fitment is required.
Are 350x52.5x86 and 350x54.5x86 interchangeable?
No. The pitch is different. Width and link count matching does not make the tracks interchangeable.
Should I order by the KX040-4 model name alone?
No. Because two cataloged configurations exist, verify the molded size on the existing track or confirm the machine configuration first.
Confirm the Exact KX040-4 Configuration
View the Kubota KX040-4 rubber-track options, use the Rubber Track Finder, or call (850) 816-7898. The goal is simple: identify the exact pitch before a track ships.
Use This Guide with the Live Catalog
The resources below connect this topic to the current machine, track-size, tread and undercarriage catalog.
Related Rubber Track Resources
Quick Buying Answers
Which rubber track rides the smoothest? For a verified fitment that offers it, Multi-Bar is usually the first tread to compare when lower vibration and smoother travel matter most.
Which track lasts longest on pavement? On asphalt and other hard, relatively flat surfaces, Multi-Bar is a strong first choice because it spreads contact across more tread bars. For harsher abrasive work such as broken concrete, rock, or demolition debris, compare a heavier C-Block or Staggered Block pattern instead.
What is the best track for paving? Start with Multi-Bar when ride quality, steady contact, and hard-surface travel are priorities. Confirm that the exact pattern is available for your machine before ordering.
What is the most affordable track? Price depends on the exact width, pitch, link count, guide type, and tread. Once fitment is confirmed, compare the live compatible options rather than changing dimensions just to save money.
What about mud, snow, or soft ground? Zig-Zag is usually the better pattern to compare when cleanout and bite matter more than pavement manners.