When it is time to replace the rubber tracks on a compact track loader, the width already on the machine is not always the only width available. Some CTLs have more than one confirmed track-width configuration—but that does not mean every wider or narrower track with the same pitch and link count is automatically interchangeable.
The right approach is simple: confirm fitment first, then choose the footprint that best matches the work.
This guide compares the three common mid-size CTL widths—320mm, 400mm, and 450mm—and explains where each makes sense, what changes when you change width, and which machines in TrackTECH's verified fitment catalog have confirmed alternatives.
Quick Answer: 320mm vs. 400mm vs. 450mm
| Track Width | Approx. Width | Best Reason to Choose It | Main Trade-Off |
|---|---|---|---|
| 320mm | 12.6 in / commonly called 13 in | Transport clearance, lower track mass, firm-ground work | Less flotation in soft ground |
| 400mm | 15.7 in / commonly called 16 in | Balanced flotation, stability, and transportability | Wider and heavier than a 320mm setup |
| 450mm | 17.7 in / commonly called 18 in | Maximum flotation where the machine has a confirmed 450mm fitment | More width, weight, cost, and transport considerations |
The important part: width is only one piece of fitment. Pitch, link count, guide type, undercarriage geometry, and sometimes the machine's specific frame or configuration also matter.
What Track Width Actually Changes
1. Flotation and Ground Pressure
For the same machine, a wider track generally spreads weight across a larger contact area. That lowers nominal ground pressure and helps the machine stay on top of mud, sand, snow, loose soil, and other soft surfaces.
A narrower track concentrates the machine's weight over a smaller area. In some conditions that can help the track cut through a loose surface layer and reach firmer material underneath, but tread pattern and ground conditions still play a major role in usable traction.
2. Stability and Machine Footprint
A wider approved track can increase the machine's lateral footprint and often gives the loader a more planted feel on uneven ground. How much the stance actually changes depends on the undercarriage and track configuration, so width alone should not be treated as a guaranteed stability upgrade.
3. Overall Transport Width
This is one of the biggest practical differences. An extra few inches of track on each side can be the difference between fitting cleanly on a trailer or creating a transport problem.
If you work through residential gates, between trailer fenders, or in tight access areas, overall machine width needs to be checked before moving to a wider track.
4. Rotating Mass
Wider rubber tracks typically weigh more. That adds rotating mass to the undercarriage, which the drive system has to accelerate, stop, and turn. It is reasonable to consider that extra mass when comparing widths, but undercarriage life is influenced by much more than track width—proper tension, alignment, terrain, debris, turning habits, sprocket condition, and maintenance all matter.
5. Replacement Cost
All else equal, wider tracks usually require more rubber and steel and therefore tend to cost more. The cheapest track, however, is not necessarily the lowest-cost option on the job. A width that keeps a machine productive in the conditions it actually works can be worth more than the difference in purchase price.
320mm Rubber Tracks: The Narrow, Transport-Friendly Option
A 320mm track is approximately 12.6 inches wide and is commonly referred to as a 13-inch track.
It is a strong choice when transport width, tight access, lower track mass, and firm-ground operation matter more than maximum flotation.
320mm makes the most sense when:
- Your trailer or access points limit overall machine width.
- You spend most of your time on compacted dirt, gravel, hard surfaces, or other reasonably firm ground.
- Your machine has a verified 320mm configuration and you do not need the extra footprint of a wider option.
- Lower replacement cost is important.
The trade-off is straightforward: a smaller footprint produces more ground pressure than a wider track on the same machine, so flotation suffers first when conditions get soft.
400mm Rubber Tracks: The All-Around Middle Ground
A 400mm track is approximately 15.7 inches wide and is commonly called a 16-inch track.
On many mid-size CTLs, 400mm is the practical middle ground. It provides more footprint than a 320mm track without moving all the way to an 18-inch 450mm configuration.
400mm makes the most sense when:
- You work across mixed dirt, clay, gravel, landscaping, and moderately soft conditions.
- You want more flotation than a confirmed 320mm setup provides.
- Your machine and trailer have adequate clearance.
- Your machine's exact undercarriage has a confirmed 400mm fitment.
A good example is the Kubota SVL75-2. TrackTECH's governed fitment data confirms both 320x86x52 and 400x86x52 B-guide configurations. That does not mean an operator should blindly change widths; the existing track and undercarriage configuration should still be verified before ordering.
450mm Rubber Tracks: Maximum Footprint for Confirmed Applications
A 450mm track is approximately 17.7 inches wide and is commonly referred to as an 18-inch track.
Where a 450mm configuration is genuinely confirmed for the machine, it provides the largest footprint of these three widths and is the choice to consider when flotation is the priority.
450mm makes the most sense when:
- Soft ground, mud, sand, snow, or sensitive surfaces are a regular part of the job.
- The machine has a verified 450mm fitment—not just a supplier cross-reference.
- Trailer width and jobsite access can accommodate the wider setup.
- The extra track weight and purchase cost make sense for the application.
Do not assume that a 450mm track is an available upgrade just because a machine uses an 86mm pitch. A correct fit requires the entire undercarriage interface to match.
Fitment Comes Before Width
Rubber tracks are normally identified by width x pitch x link count, such as 400x86x52. But those three numbers are not always the entire story.
Correct fitment can also depend on:
- Guide type and internal lug geometry
- Sprocket engagement
- Roller and idler clearance
- Frame or undercarriage configuration
- Serial-number or production changes on certain machines
That is why two tracks with the same calculated circumference are not automatically interchangeable. For a deeper explanation, read Rubber Track Size Math: Why Same-Length Tracks Aren't Always Interchangeable and our Rubber Track Sizes Explained guide.
TrackTECH-Verified Width Examples
The table below shows selected applications confirmed in TrackTECH's governed fitment catalog. It is intentionally limited to verified configurations rather than every supplier cross-reference we have encountered.
| Machine | Pitch x Links | Guide | Confirmed Widths |
|---|---|---|---|
| Bobcat T76 | 86 x 53 | B | 320mm, 400mm, 450mm |
| Bobcat T650 / T630 / T200 / 864 | 86 x 52 | B | 320mm, 400mm, 450mm |
| CAT 259D3 / 259D / 259B3 | 86 x 53 | B | 320mm, 400mm |
| Kubota SVL75-2 / SVL65-2 / SVL75-3 | 86 x 52 | B | 320mm, 400mm |
| John Deere 325G / 323E / 323D / CT322 | 86 x 52 | B | 320mm, 400mm |
| Takeuchi TL130 / TL230 / TL8 | 86 x 52 | T | 320mm, 400mm |
| Takeuchi TL8R2 | 86 x 52 | B | 320mm, 400mm |
| Wacker Neuson ST28 / ST31 | 86 x 52 | B | 320mm, 400mm |
| Case 420CT | 86 x 50 | B | 320mm, 400mm |
| IHI CL35 | 86 x 52 | B | 320mm, 400mm |
| JCB 190T | 86 x 52 | B | 320mm, 400mm |
| Komatsu CK20 / CK20-1 / CK25 | 86 x 52 | B | 320mm, 400mm |
| CAT 259B | 86 x 53 | B | 320mm |
| Case TR270B / TR310B | 86 x 50 | B | 320mm |
| Kubota SVL75-2C / SVL75C | 86 x 52 | B | 320mm |
| Takeuchi TL6R | 86 x 50 | B | 320mm |
| Takeuchi TL10V2 | 86 x 52 | B | 400mm |
Important: this is a reference, not permission to change widths without checking the machine. If you are moving away from the width currently installed, verify the track marking, guide configuration, clearances, and machine-specific fitment first. For guide terminology, see Rubber Track Guide Types Explained.
Width and Tread Pattern Solve Different Problems
Track width controls the size of the machine's footprint. Tread pattern controls how that footprint interacts with the surface.
A wider track does not automatically have better traction, and a narrow track does not automatically have worse traction. C-Block, Zig-Zag, Multi-Bar, and other tread designs behave differently in mud, dirt, gravel, hard surfaces, and snow.
If you already know the correct size and are deciding on tread, use our C-Block vs. Zig-Zag vs. Multi-Bar comparison.
How to Choose Your Width in 30 Seconds
- Confirm which widths actually fit your machine. Do not start with the width you want; start with verified fitment.
- Mostly soft ground? Consider the widest confirmed configuration that still works with your trailer and jobsite access.
- Mixed construction work? A confirmed 400mm configuration often provides a useful balance of footprint and transportability.
- Tight transport or mostly firm ground? A confirmed 320mm configuration may be the more practical choice.
- Need maximum flotation? Consider 450mm only on machines with a verified 450mm fitment and adequate clearance.
Frequently Asked Questions
Can I put wider rubber tracks on my compact track loader?
Sometimes. Many CTLs have confirmed alternate-width configurations, while others do not. Width, pitch, links, guide type, sprocket engagement, and undercarriage clearance all need to match. Verify your exact machine before changing widths.
Are wider tracks always better in mud?
Wider tracks generally improve flotation by spreading machine weight over a larger footprint, which is valuable in soft ground. Actual mobility still depends on tread pattern, soil conditions, machine weight, operator technique, and how deep the underlying firm layer is.
Do narrow tracks have more traction?
Not automatically. A narrower track creates higher ground pressure on the same machine and can sometimes cut through a loose surface layer more effectively. Tread design and terrain are major factors in actual traction.
Will wider tracks wear out my undercarriage?
A wider track generally adds weight and rotating mass, but track width alone does not determine undercarriage life. Correct tension, sprocket and roller condition, alignment, debris management, turning habits, and operating surface are all major wear factors.
How do I know which track width fits my machine?
Start with the size molded into the existing track, then confirm the machine make, model, and undercarriage configuration. You can also use the TrackTECH Rubber Track Finder or contact TrackTECH with your machine information for fitment confirmation.
Get the Right Track Before You Order
Choosing between 320mm, 400mm, and 450mm is not about buying the biggest track available. It is about matching a verified fitment to the conditions your machine actually works in.
If you work in soft ground and your machine supports a wider configuration, the extra footprint can be valuable. If transport width and firm-ground performance matter more, a narrower confirmed option may be the smarter setup.
Not sure what your machine can run? Use the Rubber Track Finder, browse replacement rubber tracks, or call TrackTECH at (850) 816-7898 with your make, model, and current track size.