The 1988 GMC Trucks Jimmy sits in the era when full-size sport utility vehicles had to balance everyday utility, highway comfort, and off-road capability in one square-shouldered package. Buyers and restorers often approach this generation with very different goals, from stock-style cruising to a more rugged truck presentation. Tire selection matters because this Jimmy uses 15-inch radial fitments in three distinct sizes: 215/75R15, 235/75R15, and 31X10.50R15. That opens the door to choices ranging from traditional whitewall street radials to raised-white-letter all-terrain tires. The key is matching the right size to the exact sub-model and wheel setup before deciding on appearance or use.
Which Tire Size Is Right for The 1988 GMC Trucks Jimmy
The 1988 GMC Trucks Jimmy uses three primary tire sizes, all built as radial tires for 15-inch rims. The right choice depends first on the exact sub-model, since some versions use all three sizes while others use only two, and the 31X10.50R15 option represents a noticeably different light-truck fitment than the metric street-oriented sizes.
235/75R15 is a metric radial size in which 235 refers to nominal section width in millimeters, 75 is the aspect ratio, R identifies radial construction, and 15 is the wheel diameter in inches. On a 1988 GMC Trucks Jimmy, this size suits buyers who want a common 15-inch radial fitment with a broad mix of tire styles. Available choices include BFGoodrich, American Classic, Maxxis, Coker Classic, Tornel, and Travelstar, with options spanning raised white letter, narrow whitewall, and wide whitewall designs. It is a useful size to evaluate when appearance and road-use character both matter.
31X10.50R15 uses a flotation-style light truck format, with 31 representing approximate overall tire diameter in inches, 10.50 indicating nominal section width, R for radial construction, and 15 for wheel diameter. On the 1988 GMC Trucks Jimmy, this is the more truck-oriented option among the primary sizes and gives the vehicle a distinctly different stance than the metric radials. The available product choice centers on the BFGoodrich All-Terrain T/A KO2 with a raised white letter sidewall. It is the size to examine closely when the Jimmy has a more utility-focused setup or a wheel package intended for wider light-truck tires.
215/75R15 is a metric radial size where 215 is the nominal section width in millimeters, 75 is the aspect ratio, R means radial construction, and 15 is the rim diameter in inches. For the 1988 GMC Trucks Jimmy, this is the narrower of the metric 15-inch fitments and it carries a strong mix of restoration-oriented and street-use choices. Available options include BFGoodrich, Coker Classic, American Classic, Maxxis, Tornel, and Travelstar, with both narrow and wide whitewall treatments as well as a black sidewall all-terrain offering. It deserves attention when wheel width, intended appearance, and sub-model fitment need to stay closely aligned.
Sub-model fitment is not identical across the 1988 GMC Trucks Jimmy range. Checking whether the vehicle is a Base or Sierra Classic matters because the Sierra Classic can use an additional metric size that is not shared by every Jimmy configuration.
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1988 GMC Trucks Jimmy Base
The 1988 GMC Trucks Jimmy Base uses 235/75R15 or 31X10.50R15 radial tires on 15-inch wheels. That means the decision is less about construction and more about confirming whether the Jimmy is set up for the metric street-style fitment or the wider flotation light-truck size.
The 1988 GMC Trucks Jimmy Sierra Classic has the broadest fitment range, using 215/75R15, 235/75R15, or 31X10.50R15 radials. Tire selection starts with confirming the current wheel and size setup, then narrowing the choice by desired look, from whitewall cruiser styling to an all-terrain 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 1988 GMC Trucks Jimmy Tires for Sale
Available 15-inch radial choices for the 1988 GMC Trucks Jimmy range from BFGoodrich all-terrain tires to American Classic, Coker Classic, Maxxis, Tornel, and Travelstar whitewall options. The product grid is most useful for comparing size-specific sidewall treatments, tire series, and rim-width compatibility.
Common 1988 GMC Trucks Jimmy tire questions usually come down to exact size by sub-model, 15-inch rim fitment, whitewall versus raised-white-letter styling, and checking wheel or suspension changes before putting the vehicle back on the road.
Tire Size & Fitment
What tire size fits a 1988 GMC Trucks Jimmy?
A 1988 GMC Trucks Jimmy uses one of three 15-inch radial tire sizes: 215/75R15, 235/75R15, or 31X10.50R15. The exact size depends on the sub-model and the wheel setup on the vehicle, with the Base using 235/75R15 or 31X10.50R15 and the Sierra Classic using 215/75R15, 235/75R15, or 31X10.50R15.
That makes identification more important than simply ordering by year and model name alone. Start by confirming the sub-model, then verify the size already mounted on the vehicle and the actual 15-inch wheel configuration, especially if the Jimmy has been changed from stock-style street tires to a wider light-truck setup.
What size rim does a 1988 GMC Trucks Jimmy use?
The 1988 GMC Trucks Jimmy uses 15-inch rims with its primary tire fitments. All three supported sizes for this vehicle family, 215/75R15, 235/75R15, and 31X10.50R15, are built around a 15-inch wheel diameter even though they differ noticeably in width and overall profile.
Rim diameter is only the first checkpoint, though. Wheel width still matters, particularly when comparing a narrower 215/75R15 to a much larger 31X10.50R15 light-truck tire, so it is smart to verify the actual wheel dimensions before choosing between whitewall road tires and a wider all-terrain option.
Do all 1988 GMC Trucks Jimmy sub-models use the same tire size?
No. The 1988 GMC Trucks Jimmy Base uses 235/75R15 and 31X10.50R15, while the Sierra Classic can also use 215/75R15 in addition to those two sizes. All of them are radial tires for 15-inch rims, but the fitment range is broader on the Sierra Classic.
That difference matters because it changes the starting point for tire shopping. A Base owner usually compares the standard metric fitment against the larger flotation-size truck tire, while a Sierra Classic owner may also need to decide whether the narrower 215/75R15 matches the vehicle's present wheel and appearance setup.
Choosing the Right Tire
What should I consider when choosing a 1988 GMC Trucks Jimmy tire?
The first step is choosing the correct size for the vehicle's actual setup: 215/75R15, 235/75R15, or 31X10.50R15. After that, the main decision becomes how the Jimmy is used and presented, since available choices include whitewall street radials in the metric sizes and a raised-white-letter all-terrain tire in the wider flotation size.
A Jimmy built for restoration-minded cruising may point toward a whitewall radial, while a more truck-oriented look may favor the all-terrain format. Wheel width, load capacity, sidewall style, and the stance you want on the vehicle all deserve a quick check before settling on one tire series.
What sidewall styles are available for 1988 GMC Trucks Jimmy tires?
Sidewall choices for the 1988 GMC Trucks Jimmy include narrow whitewall, wide whitewall, raised white letter, and black sidewall all-terrain presentations depending on tire size. The metric radial sizes offer the broadest visual range, while 31X10.50R15 centers on a raised-white-letter BFGoodrich all-terrain option.
That variety lets the tire change the truck's character quite a bit without changing the wheel diameter. A whitewall setup leans toward a more traditional or restoration-oriented appearance, while raised white letters create a more rugged period truck look, so it helps to match the sidewall style to the Jimmy's overall finish.
What brands offer tires for the 1988 GMC Trucks Jimmy?
Available brands for 1988 GMC Trucks Jimmy tire sizes include BFGoodrich, American Classic, Maxxis, Coker Classic, Tornel, and Travelstar. Brand availability depends on the size, with the two metric radial fitments offering the widest mix and the 31X10.50R15 size focusing on a BFGoodrich all-terrain product.
Brand choice is most useful when it also lines up with the tire style you want. Some options emphasize whitewall presentation for a more classic look, while others emphasize utility styling or all-terrain character, so it makes sense to compare brand, sidewall treatment, and tire series together rather than in isolation.
Restoration & Appearance
Which tire should I choose for a period-style 1988 GMC Trucks Jimmy?
A period-style 1988 GMC Trucks Jimmy usually starts with the correct 15-inch radial size for the sub-model and wheel setup, then narrows the choice by appearance. In the metric sizes, whitewall radials from American Classic, Coker Classic, BFGoodrich Silvertown, Maxxis, Tornel, and Travelstar provide a more traditional presentation than an all-terrain truck tire.
That does not make one sidewall treatment automatically right for every restoration. If originality matters closely, compare the current vehicle against build documentation, period photos, or marque references, then choose the size and whitewall width that best support the Jimmy's intended era-correct look without overlooking wheel compatibility.
How does tire construction affect the appearance of a restored 1988 GMC Trucks Jimmy?
Construction is less of a visual dividing line here because the primary fitments for the 1988 GMC Trucks Jimmy are all radial tires. The larger visual differences come from the size itself and the sidewall treatment, especially when comparing a metric whitewall radial against a 31X10.50R15 raised-white-letter all-terrain tire.
A restored Jimmy can look substantially more road-oriented or more truck-like depending on that choice. The narrower and mid-width metric radials tend to support a cleaner stock-style presentation, while the wider flotation-size tire creates a bolder stance, so appearance goals should be weighed alongside wheel width and overall setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1988 GMC Trucks Jimmy?
Yes. Wheel changes, suspension alterations, ride-height changes, and previous tire upgrades can all affect tire fitment on a 1988 GMC Trucks Jimmy, even when the tire still uses a 15-inch rim. That matters most when comparing the metric sizes to 31X10.50R15, since width and overall profile can change the way the tire sits in the wheel opening.
A careful check of wheel width, steering clearance, and fender space helps avoid surprises. It is also worth confirming whether the Jimmy still has its original-style wheel setup or has been altered over the years, because older trucks are often changed long before the next owner begins shopping for tires.
What should I inspect before driving a 1988 GMC Trucks Jimmy on new tires?
Before driving a 1988 GMC Trucks Jimmy on new tires, inspect the wheels for damage, confirm the tire size matches the vehicle's setup, and check inflation, valve stems, and basic clearance at full steering lock. It is also smart to look over suspension and steering components so the new tires are not working against worn hardware.
A short road test should follow with attention to rubbing, pull, vibration, or unusual contact marks. Collector and hobby vehicles often sit for long periods, so fresh tires deserve the same level of attention as the rest of the chassis before the Jimmy heads out for regular driving or a longer trip.
How should tires on a collector 1988 GMC Trucks Jimmy be maintained?
Tires on a collector 1988 GMC Trucks Jimmy should be checked routinely for air pressure, tread wear, cracking, bulges, cuts, and signs of long-term aging. Even a lightly driven vehicle can develop tire issues from time, storage conditions, or infrequent use, especially if it spends long stretches parked indoors or outdoors.
Consistent maintenance also means watching for uneven wear that may point to alignment or suspension problems. Keeping the Jimmy clean, stored away from prolonged sunlight and ozone sources, and moved often enough to avoid extended flat spotting helps preserve both whitewall and all-terrain tires between driving seasons.
