Choosing the right tire size is not just about what looks good it is about what actually fits your truck without causing problems. Clearance is affected by more than just tire diameter, and overlooking the details can lead to rubbing, poor performance, and extra costs. Understanding how fitment works ensures you get a setup that functions properly in real driving conditions, not just on paper.
The general rule for most trucks
For most modern fullsize trucks like the Ford F150, RAM 1500, and Chevrolet Silverado, the largest tire you can typically run without trimming is around 33 "es.
This size provides a noticeable upgrade in both stance and ground clearance while maintaining proper clearance during turning, braking, and suspension travel.
A true 33" tire is widely considered the safest option if you want zero rubbing on a completely stock setup.
Common notrim tire sizes
Here are some of the most common tire sizes that fit most trucks without trimming or rubbing when using factory wheels and suspension.
| Tire size | Approximate diameter | Notes |
| 275 60R20 | About 33 "es | Direct fit on most trucks |
| 285 55R20 | About 32.5 "es | Slightly wider, still safe |
| 285 70R17 | About 33 "es | Popular allterrain upgrade |
| 33 x 11.5 | About 33 "es | Ideal balance of width and clearance |
These sizes maintain proper clearance and typically do not require modifications.
Can you go bigger than 33 "es?
Some trucks can fit tires closer to 34 "es without trimming, but this is where things become less predictable.
Depending on your truck’s trim level, factory ride height, and wheel setup, you may be able to run sizes like:
275 65R20
285 75R17
However, once you move into this range, you may experience:
- Minor rubbing at full steering lock
- Contact with the inner fender liners or the crash bars
- Inconsistent fitment depending on tire brand
This is why 34" tires are considered borderline on a stock truck.
What affects whether your tires will rub
Even if a specific tire size fits one truck perfectly, it may cause rubbing on another. Tire fitment depends on several variables that all work together, including wheel setup, suspension height, and tire design. Understanding these factors is essential to choosing a setup that clears properly during turning, braking, and suspension travel. Paying attention to these details helps avoid costly mistakes and ensures your upgrade performs as intended.
| Factor | How it affects fitment |
| Wheel offset | Negative offset pushes the tire outward, increasing the chance of rubbing on fenders and liners |
| Suspension height | Lower front ride height reduces clearance, while leveling kits improve space for larger tires |
| Tire width | Wider tires are more likely to contact components, even if the diameter is the same |
| Tire type and tread design | Aggressive mudterrain tires have larger lugs that increase the risk of rubbing |
| Manufacturer variation | Actual tire dimensions vary by brand, which can impact realworld fitment |
How a leveling kit changes things
Adding a leveling kit, typically around 2 "es in the front, gives you more clearance where it matters most.
With a leveling kit, many trucks can safely run:
- Wider 33" tires
- Some 34" tires with minimal risk
- More aggressive wheel and tire combinations
This is one of the most common upgrades for customers who want a bigger look without going to a full suspension lift.
If your goal is a clean, troublefree setup with no trimming, stick with a true 33" tire on stock wheels.
If you want to push beyond that, be prepared for small adjustments or upgrades, such as a leveling kit or careful wheel selection.
Every truck setup is different, and the smallest details can make a big difference in fitment.
Get expert fitment advice
Choosing the wrong tire size can lead to rubbing, uneven wear, and unnecessary costs. At Canada Custom Autoworks, we make sure your wheel and tire package is matched perfectly to your truck, driving needs, and style.
Contact Canada Custom Autoworks today to get a properly fitted setup that looks right, performs well, and installs without issues the first time.
