The 1991 GMC Trucks R2500 Suburban comes from the final years of GM’s square-body full-size truck era, a time when heavy-duty Suburbans were valued for towing, hauling, and carrying a lot of passengers and gear without giving up long-wheelbase stability. That work-focused character makes tire fitment especially important on this model. This Suburban uses a 235/85R16 radial tire, a tall modern metric size on a 16-inch rim that suits a three-quarter-ton utility vehicle. Available choices here center less on changing sizes and more on selecting the right product style, load-capable construction, and sidewall appearance for the way the truck is actually used.
Which Tire Size Is Right for The 1991 GMC Trucks R2500 Suburban
The 1991 GMC Trucks R2500 Suburban uses one primary tire size: 235/85R16, and it is a radial fitment on a 16-inch rim. That same size carries across the covered sub-models, so the main decision is not which size fits, but which tire characteristics best match the truck’s intended use, wheel setup, and overall look.
In 235/85R16, the 235 identifies nominal section width in millimeters, 85 is the aspect ratio, R means radial construction, and 16 is the wheel diameter in inches. For the 1991 GMC Trucks R2500 Suburban, that makes it a modern metric radial size well suited to a heavy-duty full-size truck application. The available option in this size uses BFGoodrich’s All Terrain TA KO2 series with raised white letter sidewalls and a rim-width range of 6.0 to 7.5 inches. This size is the right starting point when the truck retains its original wheel diameter and needs a tire that supports utility-focused road use.
Tire fitment is straightforward across the covered 1991 GMC Trucks R2500 Suburban sub-models. Both sub-models use the same 235/85R16 radial size, so selection comes down to wheel compatibility, tire style, and how the truck is driven or presented.
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1991 GMC Trucks R2500 Suburban (DRW)
The 1991 GMC Trucks R2500 Suburban (DRW) uses the same 235/85R16 radial tire size as the other covered configuration. That keeps the focus on confirming the actual wheel setup and then choosing a tire with the right rim-width compatibility, load-capable specification, and sidewall presentation.
The 1991 GMC Trucks R2500 Suburban Base also uses 235/85R16 radial tires on 16-inch wheels. Since size is consistent, the decision shifts to picking the product characteristics that suit the truck’s use, whether that means a more traditional truck look or a more aggressive raised white letter presentation.
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 1991 GMC Trucks R2500 Suburban Tires for Sale
Available 235/85R16 choices for the 1991 GMC Trucks R2500 Suburban focus on radial truck tire characteristics rather than alternate sizes. The current option is a BFGoodrich All Terrain TA KO2 with raised white letter sidewalls and a 6.0 to 7.5 inch rim-width range.
Owners usually need to confirm one thing first on a 1991 GMC Trucks R2500 Suburban: that the truck still uses the correct 16-inch wheel setup for 235/85R16 tires. From there, the key questions involve tire selection, appearance, and road-use inspection.
Tire Size & Fitment
What tire size fits a 1991 GMC Trucks R2500 Suburban?
The 1991 GMC Trucks R2500 Suburban uses a 235/85R16 radial tire. That is the primary size for the covered fitments, including the Base and the DRW version, and it is used on a 16-inch wheel.
Since there is one primary size, the main fitment check is making sure the truck still has the correct wheel diameter and an appropriate wheel width for the tire being considered. Trucks that have had wheel swaps, suspension changes, or other modifications should be checked carefully before mounting new tires.
What size rim does a 1991 GMC Trucks R2500 Suburban use?
The 1991 GMC Trucks R2500 Suburban uses a 16-inch rim with its 235/85R16 tire size. That wheel diameter is part of the tire size itself, and it is central to selecting the right replacement tire.
Wheel diameter is only part of the fitment picture, so wheel width should still be verified before choosing a specific product. The available 235/85R16 option here fits a 6.0 to 7.5 inch rim width range, which makes that measurement worth confirming on any truck that may have replacement wheels.
Do all 1991 GMC Trucks R2500 Suburban sub-models use the same tire size?
Yes. The covered 1991 GMC Trucks R2500 Suburban sub-models use the same 235/85R16 radial tire size. That includes both the Base model and the DRW version shown here.
Shared size simplifies selection, but it does not remove the need to inspect the actual truck. A Suburban that has been altered over the years may have different wheels or clearance conditions, so it is still smart to confirm wheel dimensions and look for any signs of rubbing, uneven wear, or suspension-related clearance issues.
Choosing the Right Tire
What should I consider when choosing a 235/85R16 tire for a 1991 GMC Trucks R2500 Suburban?
Start with the basics: the tire should be 235/85R16 and it should match the truck’s 16-inch wheel setup. From there, compare construction, load-capable specifications, rim-width compatibility, sidewall treatment, and the kind of use the Suburban sees, whether that is highway driving, utility work, or mixed-surface travel.
A three-quarter-ton Suburban benefits from a tire that suits both the vehicle’s size and how it is driven. It also helps to compare details such as maximum load rating at the stated pressure and product weight, then confirm that the wheel and truck setup are appropriate before making a final choice.
What sidewall styles are available for 1991 GMC Trucks R2500 Suburban tires?
The available 235/85R16 option for the 1991 GMC Trucks R2500 Suburban uses an RWL sidewall, meaning raised white letters. That gives the truck a more assertive late-model truck look than a plain blackwall presentation.
Sidewall style does not change the tire size, but it does affect the truck’s visual character. Raised white letters can look especially appropriate on a utility-focused Suburban, while owners aiming for a subtler appearance may want to pay close attention to sidewall styling whenever additional product choices in this size become available.
What brands offer tires for the 1991 GMC Trucks R2500 Suburban?
The available tire in 235/85R16 for the 1991 GMC Trucks R2500 Suburban is from BFGoodrich. It is part of the All Terrain TA KO2 series and uses radial construction.
Brand matters mostly as part of the overall product profile rather than as a shortcut to the right choice. A buyer should still compare the tire’s series, sidewall treatment, load specification, rim-width range, and intended use so the selection matches the actual truck and not just the name on the sidewall.
Restoration & Appearance
Which tire should I choose for a period-style 1991 GMC Trucks R2500 Suburban?
A period-style approach for a 1991 GMC Trucks R2500 Suburban starts with the correct 235/85R16 size on the proper 16-inch wheel. Since this truck uses a radial fitment, keeping the correct size and overall truck-oriented stance matters more than chasing a dramatically different construction or profile.
Appearance choices still matter, especially on a square-body-era Suburban that may be restored, preserved, or lightly upgraded. Sidewall treatment, tread character, and wheel presentation all influence the final look, so owners concerned with exact historical accuracy should also compare the truck against marque references, photos, or original sales materials.
Does correct tire fitment matter for a 1991 GMC Trucks R2500 Suburban restoration?
Yes, correct tire fitment plays a major role in how a 1991 GMC Trucks R2500 Suburban looks and sits. The right 235/85R16 size helps preserve the proper visual proportion for a heavy-duty full-size Suburban and keeps the wheel-to-tire relationship in line with the truck’s intended character.
Restoration-minded buyers should also think beyond size alone. Sidewall styling, tire series, and wheel width all influence the finished appearance, and an incorrect combination can make the truck look either under-tired or overdone. That is especially important on a large SUV where stance and proportion are easy to notice.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1991 GMC Trucks R2500 Suburban?
Yes. Modifications can affect tire fitment on a 1991 GMC Trucks R2500 Suburban even when the tire size remains 235/85R16. Changes to wheel width, wheel offset, ride height, springs, steering components, or body clearance can all alter how the tire sits and moves through its full range of travel.
A truck with aftermarket wheels or suspension changes deserves a closer inspection before new tires are installed. Check turning clearance, suspension compression space, and any signs of prior rubbing, then verify that the wheel dimensions still suit the tire’s rim-width requirements instead of assuming the original fitment automatically still applies.
What should I inspect before driving a 1991 GMC Trucks R2500 Suburban on new tires?
Before putting a 1991 GMC Trucks R2500 Suburban back into regular road use, inspect the wheels, valve stems, lug hardware, and overall wheel condition along with the new tires themselves. It is also smart to confirm inflation pressure, look for adequate clearance, and make sure the suspension and steering are in sound operating condition.
A heavy full-size Suburban places real demands on its tires, so the check should go beyond simple tread appearance. Uneven wear patterns, cracked old rubber, vibration, or wandering can point to alignment, wheel, or front-end issues that should be corrected early, especially before a longer highway trip or towing duty.
How should 235/85R16 tires on a collector 1991 GMC Trucks R2500 Suburban be maintained?
235/85R16 tires on a collector 1991 GMC Trucks R2500 Suburban should be kept properly inflated, inspected regularly, and protected from long periods of sun, heat, moisture, and ozone exposure. Even a truck that is driven infrequently can develop age-related issues such as sidewall cracking, flat spotting, or slow air loss.
Routine checks are especially important on a low-use vehicle because deterioration often shows up before tread is actually worn out. It helps to move the truck periodically, keep an eye on air pressure, and inspect for cuts, bulges, and irregular wear so the Suburban is ready for safe road use when it is time to drive it.
