“Is this worn out?” is the most expensive question in track ownership, because both wrong answers cost money. Replace too early and you throw away a season of usable life on a part that isn't cheap. Replace too late and a $50 guide takes a $400 bearing and a $1,200 hub with it. The manufacturers publish actual numbers for this. Get a caliper, take the measurement, and the question stops being a judgement call.
Measure, don't eyeball
Every threshold below is a dimension in millimetres. A worn wheel does not look dramatically different from a serviceable one, and a guide rail at 4 mm looks much like one at 6 mm — but one is scrap and the other has life left. You need calipers or a machinist's rule; a tape measure isn't precise enough at these sizes.
One thing worth internalising: these are replace-atfigures, not warnings. A part at its published limit is not “getting close” — it is done, and running it further starts damaging the parts around it.
Wheels and rolling band
The wheels — bogie wheels, mid-rollers, idlers, whatever your dealer calls them — carry the machine's weight and guide the track. Camso specifies their wear by the rolling band, the contact strip around the circumference. As it wears, the band narrows. When it narrows past spec, the wheel stops supporting the track properly and the guides start taking the load instead.
Note that the X4S has two different wheel thresholds, which is easy to get wrong: the wide wheels and the narrow inboard rear wheels are not the same part and are not measured to the same figure.
| System | Wheel | Replace when | Fig. |
|---|---|---|---|
| Camso UTV 4S1 | All | Replace if the inner surface is perforated, or the rolling band narrows below 45 mm | 36 |
| Camso X4S | Ø202 mm & Ø134 mm | Replace if the rolling band narrows to 24 mm or less (29 mm when new) | 38 |
| Camso X4S | Ø134 mm narrow (inboard, rear units) | Replace if the rolling band narrows to 17 mm or less (20 mm when new) | 39 |
| Camso X4S | Any | Replace if the internal plastic structure is visible through the rubber coating | 40 |
Camso UTV 4S1: Camso 1099-01-1154 Version A, MFY2024. Camso X4S: Camso 1099-01-1754 Version A, MFY2024.
Two additional conditions apply regardless of measurement. A wheel whose inner surface is perforated is finished. So is any wheel where the internal plastic structure is visible through the rubber coating — at that point the rubber is gone, not worn. The 4S1 manual applies the same logic to urethane tires: replace them if the inner surface is worn through or the tire is cracked between the profiles.
Track guide rails
The track guide is the cheapest part in this article and the one whose neglect does the most collateral damage. Camso gives the same threshold on both systems:
- Measure the width of the guide rails. Replace the part if any point along the guide measures under 5 mm.
- Replace it regardless of measurement if the rails are worn to the point that the concave shape is no longer visible.
“At any point” is doing real work in that sentence. Guides wear unevenly, so a guide that measures 7 mm across most of its length and 4 mm in one spot is a replacement. Measure at several points, not just the middle.
Camso's own caution is that an overly worn guide causes premature wear and damage to the other guidance components — which is the whole reason this is the part to be strict about.
Sprockets
Sprocket wear is measured across the teeth, as illustrated in your manual's figure. Both the 4S1 and the X4S use the same threshold: replace if the dimension is under 19 mm (4S1 Figure 41, X4S Figure 43).
There is also a free maintenance win in both manuals that almost nobody acts on. Camso recommends driving in 4x4 so sprocket wear is distributed evenly across all four sprockets, especially in abrasive conditions. Running two-wheel drive to save fuel concentrates all the drive wear on one axle's sprockets, so you replace two sprockets early instead of four on schedule.
Which sprocket you need depends on your machine's wheel bolt pattern rather than on the track system — see the setup specs page for the torque figures when you refit.
Bearings — the one wear check with no number
Bearings are the exception. There is no published dimension, because a bearing doesn't wear thin — it develops play, roughness or drag. Assess them by hand:
- Play: grab the wheel and try to rock it perpendicular to its axis. Any detectable movement is too much.
- Roughness: spin the wheel by hand. It should turn smoothly and silently. Grinding or notchiness means the races are damaged.
- Drag:a wheel that won't coast freely is either contaminated or failing.
- Heat: after a ten-minute run, every hub should be warm. One running noticeably hotter than its neighbours is the one about to fail.
Also inspect the seals whenever you're in there. These systems run in snow, slush and abrasive mud, and a compromised seal is what kills the bearing behind it. For the symptom side of bearing failure, see common track problems.
The rubber track itself
Tracks are usually the last thing to need replacing, and the criteria are condition-based rather than dimensional. Camso specifies replacement for tears, perforations or delaminationin the internal or external rolling path, the profiles, or the driving lugs — any of which can render the system inoperable. Beyond that, the honest criterion is performance: worn external profiles mean less traction, and if you've lost significant capability, the track is done even if nothing is torn.
Remember that front and rear tracks are different part numbers on these systems. Don't order by measuring the old one.
The cost of waiting
The reason to be strict about the cheap parts is that wear escalates. This is the same chain we describe in the maintenance guide, and the wear limits above are how you catch it at step one:
- A guide rail worn under 5 mm stops supporting the track squarely.
- The wheels then take side load they weren't designed for, and their rolling bands go out of spec early.
- The bearings in those wheels take the same load and start to fail.
- A failed bearing damages the hub, which is the expensive part.
Every step in that chain costs several times the one before it. The guide is the cheapest insurance in the system.
When the honest answer is “run it one more season”
This is the half of the question that nobody selling parts will answer for you. If you measure and the part is inside its limit, run it. Specifically:
- A wheel with a rolling band still above spec but visibly scuffed is fine. Cosmetic damage is not wear.
- Guide rails measuring 6–7 mm with the concave shape clearly visible have life left — though if you're already doing the teardown, the labour argues for replacing them while you're in there.
- Sprockets above 19 mm are serviceable, even if the teeth look pointed compared with new.
- Surface cracking in a track's outer profiles, with no tearing or delamination and no real traction loss, is not a reason to buy a track.
The exception to all of it: if a part is near its limit and pulling the system apart is the expensive half of the job, replace it now rather than doing the same teardown twice in one year.
Sources
Every threshold on this page is transcribed from a manufacturer document, free to download from the manufacturer's own site, with the figure number so you can check it against your own copy.
- Camso UTV 4S1 — 1099-01-1154 Version A (MFY2024). Checked 2026-09-26.
- Camso X4S — 1099-01-1754 Version A (MFY2024). Checked 2026-09-26.
Systems we have not transcribed a manual for — the Camso UTV ENDUR, and the Kimpex, Soucy, Polaris OEM and Mattracks lineups — carry no figures here rather than inferred ones. If your manual disagrees with this page, it wins; tell usand we'll fix it.
Key Takeaways
- These are replace-at numbers, not warnings. A part at its limit is done.
- 4S1 wheels: rolling band under 45 mm. X4S: 24 mm on the wide wheels, 17 mm on the narrow inboard rear wheels — two different figures.
- Track guides: under 5 mm at ANY point along the rail, or concave shape gone. Cheapest part, most collateral damage.
- Sprockets: under 19 mm on both Camso systems. Drive in 4x4 so all four wear evenly.
- Bearings have no published dimension — judge by play, roughness, drag and comparative heat.
- If you measure inside spec, run it. Cosmetic damage is not wear.
Common questions
When should a UTV bogie wheel be replaced?
Camso specifies it by the width of the rolling band, and the figure depends on the wheel. On the UTV 4S1, replace a wheel when the rolling band narrows below 45 mm, or if the inner surface is perforated. On the X4S, the Ø202 mm and Ø134 mm wheels are replaced at 24 mm or less (29 mm when new), while the narrow Ø134 mm wheels on the inboard side of the rear units are replaced at 17 mm or less (20 mm when new). Any wheel is scrap once the internal plastic structure shows through the rubber.
How worn can a track guide be before it needs replacing?
Camso gives the same threshold on both the UTV 4S1 and the X4S: measure the width of the guide rails, and replace the part if any point along the guide is under 5 mm. Replace it as well if the rails are worn far enough that the concave shape is no longer visible, regardless of measurement.
How do I know if my track sprocket is worn out?
Measure the sprocket teeth as shown in your manual's figure and replace the sprocket if the dimension is under 19 mm. Camso specifies this for both the UTV 4S1 and the X4S. Camso also recommends driving in 4x4 so wear is distributed evenly across all four sprockets, which matters most in abrasive conditions.
Can I replace just the bearing instead of the whole wheel?
Sometimes, and it depends on the wheel. Some wheels take serviceable bearings; others have the bearing moulded in, which turns a cheap bearing job into a wheel purchase. Identify your system by its serial number before ordering, and if the wheel's rubber is also near its wear limit, replacing the wheel is usually the better spend.