The 2018 Chevrolet Trucks Silverado 1500 sits in the modern full-size pickup market as a truck expected to handle daily driving, jobsite duty, and personal-use upgrades with equal ease. Trim level and wheel package matter quite a bit on this generation, because tire fitment ranges from 17-inch setups to 22-inch packages. This Silverado 1500 uses radial tire fitments including 255/70R17, 265/70R17, 265/65R18, 275/55R20, and 285/45R22 depending on sub-model. That means the real choice is not just size, but also matching the truck's wheel diameter, intended use, and the style of tire available in that exact fitment. A restoration mindset is less relevant here than getting the correct configuration for the truck actually sitting in the driveway.
Which Tire Size Is Right for The 2018 Chevrolet Trucks Silverado 1500
Five primary tire sizes apply to the 2018 Chevrolet Trucks Silverado 1500, and they vary by sub-model and wheel package. The first step is confirming the exact trim or option package and then verifying whether the truck is on a 17-inch, 18-inch, 20-inch, or 22-inch wheel. Once that is settled, the decision becomes choosing the right radial tire within that size for the truck's use, load needs, and appearance.
Fit(s): Custom, High Country, LT (20 Inch Option), LTZ, and WT (20 Inch Option)
Construction: Radial|Rim: 20 in
275/55R20 is a metric radial size where 275 is the section width in millimeters, 55 is the aspect ratio, R identifies radial construction, and 20 is the wheel diameter in inches. On the 2018 Chevrolet Trucks Silverado 1500, this size belongs to specific trims and wheel-option packages rather than the entire model line. Its dimensions place it among the larger factory-style fitments used on this truck, so wheel diameter confirmation is essential before comparing tires. This size makes sense for owners trying to match a 20-inch Silverado setup without moving to a different wheel package.
Fit(s): Custom, High Country, LT (22 Inch Option), and LTZ
Construction: Radial|Rim: 22 in
285/45R22 uses the same modern metric radial format, with a 285-millimeter section width, a 45-series profile, radial construction, and a 22-inch rim. For the 2018 Chevrolet Trucks Silverado 1500, this fitment is tied to trims or option packages equipped with 22-inch wheels. Its lower-profile look separates it from the taller-sidewall 17-inch and 18-inch sizes used elsewhere in the lineup. This is the size to evaluate only after confirming the truck actually carries the 22-inch wheel package, since the wheel diameter alone rules out interchange with smaller-rim fitments.
255/70R17 is a modern metric radial size that combines a 255-millimeter section width with a 70-series profile on a 17-inch wheel. On the 2018 Chevrolet Trucks Silverado 1500, it appears on certain trims that use 17-inch wheels, making it one of the more traditional full-sidewall truck fitments in the range. It should be considered alongside other 17-inch Silverado configurations rather than with the 18-inch, 20-inch, or 22-inch packages. This size is the right starting point when the truck is still on its 17-inch wheel setup and the goal is to stay with that configuration.
265/70R17 follows the same metric radial sizing system, but adds width over a 255/70R17 while keeping the 17-inch rim diameter and 70-series profile. On the 2018 Chevrolet Trucks Silverado 1500, it serves selected 17-inch applications and is the one size in this fitment group with currently available BFGoodrich All-Terrain T/A KO2 options, both with raised white letter sidewalls. Those products also vary by load specification, so selection can involve more than brand alone. This size deserves a closer look when the truck uses 17-inch wheels and the owner wants a more truck-oriented tire choice.
265/65R18 is a metric radial size with a 265-millimeter section width, a 65-series profile, and an 18-inch wheel diameter. Within the 2018 Chevrolet Trucks Silverado 1500 lineup, it sits between the 17-inch and 20-inch fitments and applies to specific trims and option combinations. That makes it important to verify the actual wheel package on the truck, especially if it has changed hands or has seen wheel swaps over time. This size is the appropriate path when the Silverado is equipped with the 18-inch setup and the goal is to stay aligned with that wheel diameter.
2018 Chevrolet Trucks Silverado 1500 Sub-Model Tires
Tire fitment for the 2018 Chevrolet Trucks Silverado 1500 changes noticeably by sub-model and by wheel-option package. Checking the exact trim matters here, because some versions share more than one approved size while others are tied to a single wheel diameter.
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2018 Chevrolet Trucks Silverado 1500 Custom
The Custom uses either a 275/55R20 or 285/45R22 radial tire depending on wheel package. Tire selection starts with confirming whether the truck carries the 20-inch or 22-inch setup, since that determines the correct fitment path immediately.
The High Country also uses either 275/55R20 or 285/45R22 radial fitments. Choosing correctly means verifying the wheel diameter on the truck first, then comparing tires within that exact size rather than treating both as interchangeable options.
The LS uses 17-inch radial tire fitments, either 255/70R17 or 265/70R17. That makes wheel diameter straightforward, but the exact size still matters when comparing replacement tires, load specifications, and overall tire character.
The LT can use 255/70R17 or 265/70R17 in its 17-inch form, depending on configuration. A buyer should confirm the truck's actual wheel and tire setup before ordering, especially on vehicles that may have changed wheels during ownership.
2018 Chevrolet Trucks Silverado 1500 LT (18 Inch Option)
The LT with the 18 Inch Option uses a 265/65R18 radial tire. This is a simpler fitment case, with the main task being confirmation that the truck still wears its 18-inch wheel package before comparing replacement choices.
2018 Chevrolet Trucks Silverado 1500 LT (20 Inch Option)
The LT with the 20 Inch Option uses 275/55R20 radial tires. Tire shopping for this version should stay focused on 20-inch fitments and avoid assuming compatibility with the 17-inch, 18-inch, or 22-inch Silverado setups.
2018 Chevrolet Trucks Silverado 1500 LT (22 Inch Option)
The LT with the 22 Inch Option uses a 285/45R22 radial tire. This configuration calls for extra attention to wheel confirmation, since the 22-inch package is distinct from the rest of the Silverado 1500 fitment range.
The LTZ has the widest fitment spread here, using 265/65R18, 275/55R20, or 285/45R22 depending on configuration. Identifying the actual wheel package on the truck is the key first step before comparing any tire options.
The SSV uses 255/70R17, 265/65R18, or 265/70R17 radial sizes depending on the setup. That range makes wheel and tire verification especially important, since more than one diameter can appear under the same sub-model name.
The WT uses either 255/70R17 or 265/70R17 in standard form. Staying with the correct 17-inch size is important when replacing tires, particularly if the truck sees work use where load specification and tire type matter.
2018 Chevrolet Trucks Silverado 1500 WT (20 Inch Option)
The WT with the 20 Inch Option uses a 275/55R20 radial tire. This version should be matched to its 20-inch wheel package first, since the standard WT fitments are different and use 17-inch wheels.
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 2018 Chevrolet Trucks Silverado 1500 Tires for Sale
Current product choices center on 265/70R17, where BFGoodrich All-Terrain T/A KO2 options are available with raised white letter sidewalls and different load specifications. That makes the product grid most useful for buyers comparing 17-inch truck-oriented tires within that exact Silverado fitment.
These FAQs focus on the exact tire sizes used on the 2018 Chevrolet Trucks Silverado 1500, how trim and wheel packages affect fitment, and what to compare before choosing tires for work, daily driving, or longer road use.
Tire Size & Fitment
What tire size fits a 2018 Chevrolet Trucks Silverado 1500?
The 2018 Chevrolet Trucks Silverado 1500 uses five possible radial tire sizes: 255/70R17, 265/70R17, 265/65R18, 275/55R20, and 285/45R22. The correct one depends on the truck's sub-model and wheel package, so there is not one universal size for every Silverado 1500 in this model year.
The most important next step is confirming the exact trim and actual wheel diameter on the truck. A WT, LT, LTZ, or High Country can have different fitments, and option packages add even more variation. If the truck has changed hands or has aftermarket wheels, checking the tire sidewall and wheel size before ordering helps avoid choosing the wrong fitment.
What size rim does a 2018 Chevrolet Trucks Silverado 1500 use?
A 2018 Chevrolet Trucks Silverado 1500 can use 17-inch, 18-inch, 20-inch, or 22-inch rims, depending on sub-model and option package. The tire sizes tied to those wheels are 255/70R17 and 265/70R17 on 17-inch rims, 265/65R18 on 18-inch rims, 275/55R20 on 20-inch rims, and 285/45R22 on 22-inch rims.
Wheel diameter is the first fitment checkpoint because it immediately narrows the correct tire size. Rim width also matters when comparing specific products, especially on truck tires with different load specifications. A quick inspection of the current wheel and tire markings is worthwhile before ordering, particularly on trucks that may have received dealer-installed or aftermarket wheel packages.
Why does the 2018 Chevrolet Trucks Silverado 1500 have more than one tire size?
The 2018 Chevrolet Trucks Silverado 1500 has more than one tire size because Chevrolet offered multiple trims and wheel-option packages across the lineup. Some versions use 17-inch tires, others use 18-inch or 20-inch setups, and certain configurations move up to a 22-inch package.
That variation means the right tire is determined by the truck's exact configuration, not just the model name on the fender. LTZ, SSV, WT, Custom, and High Country versions can overlap in some areas and differ in others. Matching the tire to the wheel package already on the truck is the practical way to keep fitment, clearance, and overall setup in the right range.
Choosing the Right Tire
What should I consider when choosing a tire for a 2018 Chevrolet Trucks Silverado 1500?
Start with the correct size for the truck's trim and wheel package: 255/70R17, 265/70R17, 265/65R18, 275/55R20, or 285/45R22. After size is confirmed, compare construction, wheel compatibility, load specification, and the kind of use the Silverado actually sees, whether that is commuting, hauling, or more truck-oriented driving.
Within the currently available product assortment, 265/70R17 buyers can compare BFGoodrich All-Terrain T/A KO2 choices with different load ratings and the same raised white letter sidewall treatment. Looking at rim-width range, maximum load figures, and overall tire character is more useful than choosing by size alone. That approach keeps the selection tied to how the truck is equipped and used.
What sidewall styles are available for 2018 Chevrolet Trucks Silverado 1500 tires?
For the available 265/70R17 Silverado 1500 products, the sidewall style is RWL, or raised white letter. That treatment gives the tire a more traditional light-truck look than a plain black sidewall, and it appears on the BFGoodrich All-Terrain T/A KO2 options in this fitment.
Sidewall style is mostly an appearance decision once the correct tire size and wheel compatibility are settled. Some owners want a more understated look, while others prefer white lettering that suits a truck-oriented presentation. The key is to separate appearance from fitment: choose the right size and specification first, then decide whether the available sidewall treatment matches the Silverado's intended style.
What brands offer tires for the 2018 Chevrolet Trucks Silverado 1500?
The current product selection for this Silverado 1500 fitment includes BFGoodrich in 265/70R17. Those products are part of the All-Terrain T/A KO2 line and give 17-inch Silverado buyers a recognizable light-truck tire option in the correct size and radial construction.
Brand should be one part of the decision, not the whole decision. It still makes sense to compare the exact specification within the size, including rim-width range, load capacity, and whether the tire's appearance and intended use suit the truck. That matters especially on pickups, where a tire may need to support anything from everyday errands to more demanding work-oriented driving.
Restoration & Appearance
Does correct tire fitment matter for a 2018 Chevrolet Trucks Silverado 1500 restoration or clean stock-style build?
Yes. Even on a newer truck like the 2018 Chevrolet Trucks Silverado 1500, correct tire fitment matters if the goal is a clean stock-style presentation or an accurately maintained trim package. Using the proper wheel diameter and tire size helps preserve the look and stance associated with that specific configuration.
The important point is that this truck did not use one universal size across the lineup. A WT on 17-inch wheels, an LTZ on 18s or 20s, and a High Country on larger wheels can all present differently. Before choosing tires for appearance reasons, confirm the truck's exact trim and wheel package so the final result still looks properly matched.
How does tire size affect the appearance of a 2018 Chevrolet Trucks Silverado 1500?
Tire size has a major effect on how a 2018 Chevrolet Trucks Silverado 1500 looks because this model ranges from taller-sidewall 17-inch fitments to lower-profile 22-inch packages. A 255/70R17 or 265/70R17 gives a more traditional truck stance, while 275/55R20 and 285/45R22 create a larger-wheel appearance.
That visual difference is one reason trim and wheel-package verification matters before replacing tires. Changing the size without confirming the intended look can alter how the truck sits and how proportionate the wheel-and-tire package appears. Even when the goal is appearance, selection should still stay grounded in the correct wheel diameter and compatible tire specification.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Chevrolet Trucks Silverado 1500?
Yes. Wheel swaps, suspension changes, leveling kits, lowering, and other modifications can affect tire fitment on a 2018 Chevrolet Trucks Silverado 1500. Since this truck already uses several different factory-style tire sizes across 17-inch, 18-inch, 20-inch, and 22-inch wheels, any change to the wheel or suspension setup can shift what will work cleanly.
A modified Silverado should be checked for wheel diameter, wheel width, and clearance at the fender, suspension, and steering range before choosing replacement tires. Even when the sidewall shows one of the known Silverado sizes, that does not guarantee the rest of the setup remains unchanged. A quick physical verification helps prevent rubbing or compatibility surprises.
What should I inspect before driving a 2018 Chevrolet Trucks Silverado 1500 on new tires?
Inspect the wheel and tire size first, then look at inflation pressure, bead seating, valve stems, lug torque, and visible clearance around the fenders and suspension. On a 2018 Chevrolet Trucks Silverado 1500, those checks matter because the truck may be using anything from a 17-inch to a 22-inch wheel package depending on configuration.
It also helps to look over the rest of the truck before regular road use. Uneven wear on the old tires can point to alignment or suspension issues, and those problems can shorten the life of the replacement set quickly. A short, careful initial drive gives a chance to catch vibration, rubbing, or steering changes before putting the truck back into normal service.
How often should tires on a 2018 Chevrolet Trucks Silverado 1500 be inspected?
Tires on a 2018 Chevrolet Trucks Silverado 1500 should be inspected regularly, not just at replacement time. Pressure, tread wear, cuts, bulges, punctures, and sidewall damage are all worth checking, especially on a truck that may see hauling, rougher surfaces, or long highway miles.
A quick visual inspection every few weeks is a sensible routine, with a closer look before longer trips or heavier-use periods. Silverado owners should also pay attention to uneven wear patterns, since those can signal alignment, rotation, or suspension concerns rather than a tire issue alone. Staying ahead of those problems helps the tire size and specification perform as intended.
