The 1998 GMC Trucks K1500 Suburban sits in the final years of the classic GMT400 era, when full-size SUVs were expected to handle family duty, towing, rough weather, and long highway miles with equal confidence. That broad-use character makes tire choice especially important on a vehicle that often sees a mix of pavement and utility work. The 1998 GMC Trucks K1500 Suburban uses a 245/75R16 radial tire on a 16-inch rim across its covered fitments. In this size, the available choice centers on an all-terrain radial with raised white letter styling. The key is matching the Suburban's intended use with the correct size, wheel compatibility, and overall tire condition before road use.
Which Tire Size Is Right for The 1998 GMC Trucks K1500 Suburban
The 1998 GMC Trucks K1500 Suburban uses one primary tire size: 245/75R16. It is a radial fitment on a 16-inch rim, and that same size carries across the Base, SLE, and SLT sub-models. That means the main decision is less about choosing between multiple factory-type sizes and more about selecting the right tire style, construction details, and rim-width compatibility for how the Suburban is actually used.
A 245/75R16 size uses a 245-millimeter nominal section width, a 75-series aspect ratio, radial construction, and a 16-inch rim diameter. On the 1998 GMC Trucks K1500 Suburban, this modern metric radial format suits the vehicle's mix of highway travel, load-carrying, and utility use better than older vintage sizing systems. Available options in this size include BFGoodrich's All-Terrain T/A KO2 with raised white letter sidewalls, giving the tire a more truck-oriented appearance. This is the size to focus on when the goal is maintaining proper overall fitment while choosing a tread and sidewall presentation that matches the vehicle's use.
Tire fitment is straightforward across the covered 1998 GMC Trucks K1500 Suburban sub-models. Base, SLE, and SLT all use the same 245/75R16 radial size, so the focus shifts from trim-level differences to wheel compatibility, tire type, and intended use.
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1998 GMC Trucks K1500 Suburban Base
The 1998 GMC Trucks K1500 Suburban Base uses the same 245/75R16 radial tire size found across the covered range. Tire selection is mainly about choosing a suitable truck-style radial and confirming the actual wheel setup if the vehicle has been changed from its original configuration.
The 1998 GMC Trucks K1500 Suburban SLE also uses 245/75R16 radial tires on a 16-inch rim. With fitment consistent at the size level, the practical choice becomes sidewall style, tread character, and making sure the wheel width falls within the tire's approved range.
The 1998 GMC Trucks K1500 Suburban SLT shares the same 245/75R16 radial fitment as the other covered sub-models. That keeps replacement straightforward, but it is still worth checking for aftermarket wheels, suspension changes, or clearance issues before settling on a replacement tire.
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 1998 GMC Trucks K1500 Suburban Tires for Sale
Available 245/75R16 choices for the 1998 GMC Trucks K1500 Suburban focus on radial truck use, with BFGoodrich's All-Terrain T/A KO2 offering a raised white letter sidewall, all-terrain character, and rim-width compatibility from 6.5 to 8.0 inches.
Common questions for the 1998 GMC Trucks K1500 Suburban usually center on 245/75R16 fitment, 16-inch wheel compatibility, trim-level consistency, truck-style radial selection, and the inspections worth making before regular road use or longer trips.
Tire Size & Fitment
What tire size fits a 1998 GMC Trucks K1500 Suburban?
The 1998 GMC Trucks K1500 Suburban uses a 245/75R16 tire size. This is a radial tire format built for a 16-inch rim, and it is the primary size used across the covered Base, SLE, and SLT sub-models.
That consistency makes size selection fairly simple, but the job is not finished once the size matches. It still helps to confirm the actual wheel diameter on the vehicle, especially if it has aftermarket wheels, and to compare the tire's approved rim-width range with the wheel before choosing a replacement.
What size rim does a 1998 GMC Trucks K1500 Suburban use?
The primary tire fitment for the 1998 GMC Trucks K1500 Suburban is built around a 16-inch rim. The 245/75R16 size itself confirms that rim diameter, since the final number in the size code refers to the wheel diameter in inches.
Rim diameter is only one part of fitment, so it is wise to check wheel width as well before mounting a new tire. A 16-inch wheel that is too narrow, too wide, or altered in offset can still create fitment issues even when the tire's size code appears correct.
Do all 1998 GMC Trucks K1500 Suburban sub-models use the same tire size?
Yes. The covered 1998 GMC Trucks K1500 Suburban Base, SLE, and SLT sub-models all use the same 245/75R16 radial tire size. That means trim level does not change the primary tire size within these fitments.
Even with shared sizing, a Suburban that has been modified may no longer follow its original wheel and tire setup. Checking the wheel diameter, wheel width, and any suspension changes helps prevent confusion, especially on older trucks that may have seen replacement wheels or lift-related changes over time.
Choosing the Right Tire
What should I consider when choosing a 245/75R16 tire for a 1998 GMC Trucks K1500 Suburban?
Start with the correct 245/75R16 size, then look at the tire's construction, load capability, rim-width compatibility, and intended use. For this Suburban, available choices in the covered fitment focus on radial truck duty rather than a vintage-style passenger-car presentation.
A Suburban used for highway cruising, mixed weather, towing, or light off-pavement driving may call for a different tread character than one used only occasionally. It also helps to compare the wheel's width against the tire's approved range and make sure the vehicle's current setup still provides proper clearance.
What sidewall styles are available for 1998 GMC Trucks K1500 Suburban tires?
The available 245/75R16 option for the 1998 GMC Trucks K1500 Suburban uses an RWL sidewall. That means raised white lettering, a traditional truck and SUV look that stands apart from a plain blackwall presentation.
Sidewall style affects appearance more than basic size fitment, but it still matters on a Suburban that may be restored, detailed, or used as a period-style driver. Choosing raised white letters gives the vehicle a more rugged visual character, while the size, rim fit, and overall condition still remain the main mechanical priorities.
What tire series are available for the 1998 GMC Trucks K1500 Suburban?
In the covered 245/75R16 fitment, the available tire series is the BFGoodrich All-Terrain T/A KO2. It is a radial truck tire series aimed at drivers who want a more utility-focused tread style than a plain highway-only appearance.
Series choice matters because it shapes the Suburban's overall character as much as the size does. An all-terrain series can complement a four-wheel-drive full-size SUV well, but it is still important to confirm wheel width, load needs, and how the vehicle is actually driven before making the final selection.
Restoration & Appearance
Which tire should I choose for a period-style 1998 GMC Trucks K1500 Suburban?
A period-style approach starts with keeping the correct 245/75R16 size on the proper 16-inch rim. Since this Suburban uses a modern radial format rather than an older bias-ply size, the right visual direction usually comes from tread style and sidewall presentation rather than construction changes.
An all-terrain radial with raised white letters can suit the late-1990s truck and SUV look very naturally. Owners chasing exact restoration details should still compare their vehicle to era-specific photos, window-sticker documentation, or marque-focused references before treating any brand or sidewall treatment as original to the vehicle.
Does correct tire fitment matter for a 1998 GMC Trucks K1500 Suburban restoration?
Yes, correct tire fitment matters because the tire size affects both stance and authenticity of presentation. For the 1998 GMC Trucks K1500 Suburban, staying with the proper 245/75R16 size preserves the intended relationship between tire, wheel, wheel opening, and overall truck appearance.
Moving away from the correct size can change how the vehicle sits and may also create clearance or wheel-compatibility problems. Even on a driver-quality restoration, it helps to verify the actual wheel dimensions on the truck and inspect for suspension or body changes that could influence how a replacement tire looks and fits.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1998 GMC Trucks K1500 Suburban?
Yes. A 1998 GMC Trucks K1500 Suburban may originally use 245/75R16 tires, but aftermarket wheels, altered wheel offset, suspension lifts, lowering changes, or body modifications can all change what clears properly. The size on the sidewall alone does not guarantee the same result on every truck.
Checking the actual wheel diameter and width is a good first step, followed by looking at steering clearance, fender clearance, and suspension travel. A Suburban that has spent years as a work or family vehicle may have changed more than once, so a careful inspection prevents avoidable fitment surprises.
What should I inspect before driving a 1998 GMC Trucks K1500 Suburban on new tires?
Before regular road use, inspect air pressure, wheel condition, lug hardware, valve stems, and the tire's seating on the rim. It also helps to look over the steering and suspension for looseness or wear, since a full-size four-wheel-drive SUV can place a lot of demand on those components.
A short initial drive followed by a second inspection is worthwhile, especially on an older truck. Recheck pressure, listen for rubbing during turns, and look for any sign of contact at the fender or suspension. Catching a clearance or wheel issue early is far easier than discovering it on a long trip.
How should 245/75R16 tires on a collector 1998 GMC Trucks K1500 Suburban be maintained?
Collector-use tires still need routine attention even when mileage stays low. Keep the 245/75R16 tires properly inflated, inspect tread and sidewalls for cracking, cuts, bulges, or irregular wear, and watch for slow air loss that may go unnoticed when the Suburban spends long periods parked.
Storage conditions matter almost as much as road use on an older vehicle. Keeping the truck away from prolonged sunlight, excess moisture, and ozone sources can help preserve tire condition, and occasional movement prevents prolonged flat spotting. A close inspection before each driving season is a smart habit on low-use SUVs.
