Stud Charts
Enter Your Snowmobile to Find Your Application
Finding the correct application for your snowmobile is not straightforward. That's why we created our snowmobile studs size chart so the only thing you need to do is enter your model. Buying the correct stud kit has never been easier! If you want to know the technical aspects that go into our recommendation, continue reading below.
How We Determine Your Stud Size
The determining factor for the stud you will run in your track is the lug height. All recommendations presume the lug height is equal to the height in new condition. Wear on a used track can cause you to move down a size.
Stud Size Chart by Lug Height
Use this comprehensive chart to determine the correct stud specifications for your track:
| Lug Height | Track Thickness | Stud Size | Overall Length | Penetration | Recommended Nut |
|---|---|---|---|---|---|
| 0.82" | 0.250" | 1.000" | 1.375" | ~0.375" | Zinc or SS |
| 0.88" | 0.250" | 1.000" | 1.375" | ~0.375" | Zinc or SS |
| 0.91" | 0.250" | 1.075" | 1.425" | ~0.375" | Zinc or SS |
| 1.00" | 0.250" | 1.175" | 1.525" | ~0.375" | Zinc or SS |
| 1.25" | 0.250" | 1.375" | 1.725" | ~0.375" | Zinc or SS |
| 1.352" Cobra* | 0.250" | 1.375" | 1.725" | ~0.375" | Zinc or SS |
| 1.375" | 0.250" | 1.500" | 1.850" | ~0.375" | 1/2" Tall Nut |
| 1.500" | 0.250" | 1.625" | 1.950" | ~0.375" | 5/8" Tall Nut |
| 1.6" Cobra* | 0.250" | 1.625" | 1.950" | ~0.375" | 5/8" Tall Nut |
| 1.75" | 0.250" | 1.920" | 2.225" | ~0.375" | 3/4" Tall Nut |
*Cobra Track Note: The 1.352" Cobra has an effective lug height of 1.25" and the 1.6" Cobra has an effective lug height of 1.5". Learn more about Cobra track sizing.
Stud Quantity by Track Length
Track length and horsepower determine how many studs you need for optimal performance:
| Track Length | Pitch | Windows | 2x Row | 3x Row | 4x Row |
|---|---|---|---|---|---|
| 120" | 2.86" | 42 | 84 | 126 | 168 |
| 121" | 2.52" | 48 | 96 | 144 | 192 |
| 128" | 2.52" | 51 | 102 | 153 | 204 |
| 129" | 2.86" | 45 | 90 | 135 | 180 |
| 133" | 2.52" | 53 | 106 | 159 | 212 |
| 136" | 2.52" | 54 | 108 | 162 | 216 |
| 137" | 2.86" | 48 | 96 | 144 | 192 |
| 141" | 3.00" | 47 | 94 | 141 | 188 |
| 144" | 2.52" | 57 | 114 | 171 | 228 |
| 146" | 2.86" | 51 | 102 | 153 | 204 |
| 151" | 2.52" | 60 | 120 | 180 | 240 |
| 154" | 2.86" | 54 | 108 | 162 | 216 |
| 155" | 2.86" | 54 | 108 | 162 | 216 |
| 156" | 2.52" | 62 | 124 | 186 | 248 |
Horsepower Guidelines
Why These Recommendations Matter
The amount of horsepower and track length are the two factors determining the number of studs you will run. As you increase horsepower, you need to take the added torque off the studs/track. For example, going from 2 to 3 per row, you'll reduce the load by 33% and spread the stress evenly among the track.
All of our application recommendations are based on 30 years of R&D and feedback from our customers. Our data spans tens of thousands of snowmobiles in every environment. We advise staying within the recommendations as it is the optimum length/quantity for longevity and effectiveness. When you purchase our stud kit, you're getting this proven expertise built into every recommendation.
⚠️ Important: Running studs longer or quantities less than recommended voids the lifetime warranty against breakage on kits, can cause premature wear and damage to the track/studs. Online sites can be a good source of information, but we see a lot of bad advice regarding studding. One user's experience running outside of recommendation is only one data point versus the thousands we've collected.
Frequently Asked Questions
Yes, you can, and if you buy a stud kit and would like a pattern for that amount, we can custom make you one. We prefer a consistent amount because those patterns cannot be balanced and create an uneven layout.
Of course, but we recommend sticking to 3 per row. By going 4-2, half of your track windows will have more strain than the other half. By running 3-3-3-3, you'll still have the same amount of studs on the ground and are spreading the stress evenly across the track. Our 3-3-3-3 patterns are also balanced; each stud is counterbalanced on the next row.
Running a taller than recommended stud is a short-term choice. By going higher than 3/8" penetration, the stud will no longer be supported by the lug and will increase the instances you are riding only on the stud, like on road crossings or low snow conditions.
Running fewer studs is not a good way to increase hook-up by increasing the load on each stud. Tracks are not like a bed of nails, and you will need to match the machine's horsepower to spread the load.
While it looks like it's only 1/8" higher on paper, our chart shows that setup will have about 3/8" of penetration. You can learn more about how they are measured here.
Cobra tracks have teeth on top of the lug that are about 0.10" that are counted to the overall length. The actual lugs have an effective height of 1.25 and 1.5. You can learn more about these tracks here.
No, the stud generates too much leverage at that height and is not feasible for the track.
Starting in the 2007-08 model years, Camso introduced the 2.86" pitch track. Windows were spaced wider, reducing the number of lugs to save weight. A fast way to get the number of windows is to divide the track length by pitch. 121/2.52 = ~48, 137/2.86 = ~48.
For low horsepower applications, the minimum is 2 per row. Keep in mind only 40% of the studs are on the ground at a time, so running 48 studs would put only 20 studs on the ground at a time. For higher horsepower, that number jumps up to 3x and 4x per row.
The standard nut covers the same thread as a flat backer with a tall nut with our XL backer.
Check out our comprehensive installation guide with detailed instructions and video tutorials to ensure proper stud installation.
Every stud kit includes access to our TracSpec™ Templates - custom printable patterns specific to your track length and stud quantity for professional results.
