The 2020 GMC Trucks Canyon sits in the modern midsize pickup segment, blending everyday drivability with the utility expected from a truck that may see commuting, towing, and light off-road use. Trim level matters more here than broad model history, because wheel and tire fitment changes across the Canyon lineup. This exact model range uses five primary radial tire sizes: 255/65R17, 265/65R17, 265/70R16, 255/55R20, and 265/60R18. Product selection in the covered sizes includes BFGoodrich All-Terrain T/A KO2 options with raised white letter styling. The key step is matching the truck's sub-model and wheel diameter before comparing tread style, load capacity, and road-use priorities.
Which Tire Size Is Right for The 2020 GMC Trucks Canyon
Five tire sizes apply to the 2020 GMC Trucks Canyon, and they vary by sub-model and wheel diameter. The first step is confirming the exact trim and whether the truck is on a 16-, 17-, 18-, or 20-inch rim. Once that is settled, the decision shifts to choosing the right radial tire for the truck's intended use, including whether an all-terrain option and its rim-width range match the current wheel setup.
255/65R17 is a metric radial size in which 255 indicates nominal section width in millimeters, 65 is the aspect ratio, R marks radial construction, and 17 is the rim diameter in inches. On the 2020 GMC Trucks Canyon, this size is one of the 17-inch fitments used on specific sub-models rather than the full lineup. Available product coverage in this size includes a BFGoodrich All-Terrain T/A KO2 with raised white letter sidewalls. It is a useful choice to evaluate when the truck already has 17-inch wheels and the goal is to keep a modern truck-style all-terrain look.
265/65R17 follows the same metric radial format, with a 265-millimeter nominal section width, a 65-series profile, and a 17-inch rim diameter. For the 2020 GMC Trucks Canyon, this is another 17-inch primary fitment tied to certain sub-model configurations, so it should not be treated as universal across every Canyon trim. Product details here are more about fitment confirmation than broad appearance variety, since wheel diameter and trim identification come first. This size deserves a close look when replacing tires on a Canyon that already sits on the larger of the two 17-inch fitments.
265/70R16 is a metric radial with a 265-millimeter nominal width, a 70-series profile, and a 16-inch rim diameter. On the 2020 GMC Trucks Canyon, it serves specific trims using the 16-inch wheel package, making wheel confirmation especially important before replacement. Available options in this size include the BFGoodrich All-Terrain T/A KO2 with raised white letter sidewalls, a 7.0- to 8.5-inch rim-width range, and a 3,195-lb maximum load at 80 psi. This size is often the practical place to start when the truck is equipped for everyday truck duty and light all-terrain use.
255/55R20 is a metric radial size where 255 is the nominal width in millimeters, 55 is the aspect ratio, and 20 identifies the wheel diameter. For the 2020 GMC Trucks Canyon, this size belongs to a distinct 20-inch setup rather than a broad shared fitment across the range. That makes wheel diameter the deciding factor before looking at any replacement tire style or tread pattern. This size is the one to evaluate when maintaining the truck's 20-inch wheel package and preserving the proportions intended for that specific Canyon configuration.
265/60R18 uses a 265-millimeter nominal section width, a 60-series profile, radial construction, and an 18-inch rim. Within the 2020 GMC Trucks Canyon lineup, this size applies to selected sub-models, so it should be matched to the truck's actual trim and wheel package instead of assumed from the model name alone. Product comparison in this size begins with basic fitment and wheel compatibility, then moves to tread style and use case. It is the right size to review when the Canyon already wears 18-inch wheels and the goal is to keep the truck on its existing wheel diameter.
Tire fitment on the 2020 GMC Trucks Canyon varies noticeably by sub-model, and some trims use more than one primary size. Checking the exact trim is essential before selecting a tire, because the lineup spans four different rim diameters and several distinct metric radial sizes.
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2020 GMC Trucks Canyon All Terrain
The 2020 GMC Trucks Canyon All Terrain uses 17-inch radial fitments and can appear with either 255/65R17 or 265/65R17. Tire selection starts with confirming which 17-inch size is on the truck now, then comparing replacement options that suit its wheel width and intended driving mix.
The 2020 GMC Trucks Canyon Base uses a 16-inch radial tire setup built around 265/70R16. That makes replacement relatively straightforward, with the main decision shifting to tread style, load capability, and whether the current wheels remain within the tire's approved width range.
The 2020 GMC Trucks Canyon Denali uses a 20-inch radial fitment with 255/55R20. Tire selection here centers on keeping the correct 20-inch size in view and verifying the truck's actual wheel package before considering any change in tire style or use emphasis.
The 2020 GMC Trucks Canyon SL shares the 265/70R16 radial tire size used on the 16-inch wheel setup. That gives owners a clear starting point for replacement, followed by the usual checks for wheel condition, load needs, and whether the truck is still on its original-style wheel dimensions.
The 2020 GMC Trucks Canyon SLE has the widest fitment spread in the lineup, using 255/65R17, 265/60R18, or 265/65R17 depending on configuration. Tire choice depends first on identifying the exact wheel diameter and installed size, then narrowing the selection to a radial tire that matches how the truck is actually used.
The 2020 GMC Trucks Canyon SLT uses the 265/60R18 radial size on an 18-inch wheel. Replacement is mainly about staying with the correct size and confirming the wheel setup, then choosing a tire style that suits the truck's daily driving, highway use, or light truck-duty needs.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2020 GMC Trucks Canyon Tires for Sale
Available product coverage for the 2020 GMC Trucks Canyon currently centers on BFGoodrich All-Terrain T/A KO2 tires in 255/65R17 and 265/70R16. Those options use radial construction, raised white letter sidewalls, and distinct rim-width and load specifications that are worth comparing against the truck's existing wheel setup.
These FAQs focus on the tire sizes used across the 2020 GMC Trucks Canyon lineup, how trim level affects fitment, and what to review when comparing available radial truck tires for everyday use or light off-road duty.
Tire Size & Fitment
What tire size fits a 2020 GMC Trucks Canyon?
The 2020 GMC Trucks Canyon uses five primary tire sizes across the model range: 255/65R17, 265/65R17, 265/70R16, 255/55R20, and 265/60R18. All of them are radial sizes, and the correct one depends on the truck's specific sub-model and wheel package rather than the Canyon name alone.
The practical next step is to confirm the exact trim and the wheel diameter currently on the truck. A Base or SL model may use 265/70R16, a Denali uses 255/55R20, an SLT uses 265/60R18, and some All Terrain and SLE trucks use one of the 17-inch sizes. The tire size on the sidewall and the actual wheel diameter should match before replacement.
What size rim does a 2020 GMC Trucks Canyon use?
The 2020 GMC Trucks Canyon appears with 16-inch, 17-inch, 18-inch, and 20-inch rims depending on sub-model and configuration. Those rim diameters correspond to the primary tire sizes used on the truck, including 265/70R16, 255/65R17, 265/65R17, 265/60R18, and 255/55R20.
Rim diameter is the first fitment detail to verify because a tire must match the wheel's bead-seat diameter exactly. After confirming that number, it is smart to check the full tire size, the wheel width, and whether the truck still has its original-style wheels. That matters even more on used trucks, where accessory wheels or trim swaps can change what is actually installed.
Why does the 2020 GMC Trucks Canyon have more than one tire size?
The 2020 GMC Trucks Canyon has more than one tire size because different sub-models use different wheel packages. The lineup spans work-oriented trims, more feature-rich trims, and appearance or capability packages, so the truck can be equipped with 16-, 17-, 18-, or 20-inch rims and matching radial tire sizes.
That means the right replacement tire is tied to the truck's exact trim and current wheel setup, not just the model year and name. The SLE is a good example, since it can use more than one primary size. Reading the sidewall size already on the truck and confirming the wheel diameter helps prevent ordering a tire that belongs to a different Canyon configuration.
Choosing the Right Tire
What should I consider when choosing a tire for a 2020 GMC Trucks Canyon?
Start with the correct primary tire size for the truck's trim and wheel diameter, then compare the tire's construction, load capacity, rim-width requirement, and intended use. On the 2020 GMC Trucks Canyon, every primary fitment is radial, so the main decision is less about construction type and more about selecting the right truck tire within the correct size.
Use matters after fitment is settled. A Canyon used mainly on pavement may call for a different tread emphasis than one that sees gravel, trail access roads, or heavier truck duty. It also helps to check whether the truck still has stock-style wheels, because width and wheel changes can affect how a given tire size and tread pattern work on the vehicle.
What sidewall styles are available for 2020 GMC Trucks Canyon tires?
The available product coverage shown for the 2020 GMC Trucks Canyon includes RWL sidewalls, which stands for raised white letter. That style appears on the BFGoodrich All-Terrain T/A KO2 options available in covered Canyon sizes and gives the truck a more traditional all-terrain appearance than a plain black sidewall.
Sidewall styling is mostly an appearance decision once the size, load capability, and wheel fitment are correct. Some owners prefer the more rugged visual of raised white letters, while others may want a subtler presentation if another product line is being considered elsewhere. The key is to treat sidewall style as a finishing choice, not as a substitute for correct size and wheel compatibility.
What brands offer tires for the 2020 GMC Trucks Canyon?
BFGoodrich is represented in the available 2020 GMC Trucks Canyon product coverage, specifically through the All-Terrain T/A KO2 line. The covered sizes include 255/65R17 and 265/70R16, both in radial construction and both with raised white letter sidewalls aimed at truck and all-terrain use.
Brand is only one part of the decision. It still makes sense to compare the exact size, approved rim-width range, and maximum load specification against the truck's current wheel and intended use. A well-matched tire from the available brand coverage is more important than choosing by name alone, especially on a pickup that may split time between daily driving and utility work.
Restoration & Appearance
Which tire should I choose for a period-style 2020 GMC Trucks Canyon?
A period-style approach on a 2020 GMC Trucks Canyon usually means keeping the truck in its proper trim-specific size and wheel diameter rather than trying to give it a vintage presentation. Because this is a modern midsize pickup with radial fitments throughout, the right starting point is the correct factory-era size for the truck's actual sub-model and wheel package.
Appearance choices come after that baseline is set. A more aggressive all-terrain tread and raised white letter sidewall can change the truck's visual character without moving away from its modern-era identity. If originality matters closely, compare the current wheel and tire setup to window-sticker, build, or owner documentation so the truck keeps the configuration that best matches its delivered look.
Does correct tire fitment matter for a 2020 GMC Trucks Canyon restoration or appearance-focused build?
Correct tire fitment matters because the 2020 GMC Trucks Canyon was offered with several distinct wheel diameters and tire sizes, each shaping the truck's stance and proportions differently. A Denali on 255/55R20 presents differently than a Base or SL on 265/70R16, even before tread style and sidewall treatment enter the picture.
Using the wrong size can alter the visual balance of the truck and may create unnecessary clearance or wheel-compatibility issues. For an appearance-focused build, keep trim-specific fitment in mind first, then decide whether tread style and sidewall presentation support the look being pursued. That approach preserves the Canyon's intended proportions more effectively than chasing appearance with an incorrect tire size.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 GMC Trucks Canyon?
Yes. Modifications such as aftermarket wheels, changes in wheel width, suspension lifts or lowering, and body or fender alterations can all affect tire fitment on a 2020 GMC Trucks Canyon. Even when the tire size matches one used somewhere in the Canyon lineup, a modified truck may not have the same clearance or wheel dimensions as a stock configuration.
That is why a modified Canyon should be checked for wheel diameter, wheel width, steering clearance, and fender clearance before replacement tires are chosen. The issue is especially important on trims that can use more than one size, such as the SLE. Matching the sidewall size alone is not enough when the wheel and suspension setup may have changed from original specification.
What should I inspect before driving a 2020 GMC Trucks Canyon on new tires?
Before driving a 2020 GMC Trucks Canyon on new tires, inspect the wheel diameter and width, confirm the tire size matches the truck's trim, and check that the tires are mounted and inflated correctly. It is also wise to look over the wheels for damage and make sure the tires have adequate clearance at full steering lock.
A short road check should follow, paying attention to any rubbing, vibration, or unusual pull that may point to a fitment or installation issue. On a truck used for cargo, towing, or rougher surfaces, verify that the tire's load capacity suits the job. Those basic checks help the Canyon's tires deliver the fitment and road manners expected from the selected size.
How often should tires on a 2020 GMC Trucks Canyon be inspected?
Tires on a 2020 GMC Trucks Canyon should be inspected regularly, not just when tread looks low. A quick visual check for uneven wear, cuts, bulges, cracking, and air loss is a good habit, especially on a truck that may see changing loads, mixed road surfaces, or seasonal use patterns.
More frequent checks make sense before longer drives, after off-pavement use, or any time the truck has been sitting for extended periods. It also helps to monitor pressure consistently and watch for wear that could point to alignment or suspension issues. Keeping an eye on condition between rotations and service visits helps catch problems before they affect ride quality, handling, or tire life.
