The 1991 Chevrolet Trucks Blazer sits in the final years of the square-body full-size SUV era, a period when utility, four-wheel-drive capability, and simple truck-based durability defined the vehicle’s appeal. Buyers looking at one today are often balancing original-style proportions with real road use, weekend cruising, or light trail duty. Tire fitment centers on two 15-inch radial sizes: 235/75R15 and 31X10.50R15. That creates a meaningful choice between a more standard metric radial setup and a taller flotation-style light truck tire, with available options ranging from raised white letter all-terrain styling to narrow and wide whitewall treatments. The right decision depends on the exact wheel setup, desired appearance, and how the Blazer will actually be driven.
Which Tire Size Is Right for The 1991 Chevrolet Trucks Blazer
The 1991 Chevrolet Trucks Blazer uses two primary tire sizes, and both are radial tires built for 15-inch rims. Since Scottsdale and Silverado models can use either size, the first step is confirming which wheel and tire setup is actually on the vehicle. From there, the real choice becomes whether to stay with the more standard 235/75R15 format or move toward the taller, wider 31X10.50R15 light truck look.
235/75R15 is a metric radial size in which 235 identifies the section width in millimeters, 75 is the aspect ratio, R indicates radial construction, and 15 is the wheel diameter in inches. On a 1991 Chevrolet Trucks Blazer, this size suits a more conventional full-size SUV tire profile while keeping the fitment on a 15-inch rim. Available choices include BFGoodrich, American Classic, Maxxis, Coker Classic, Tornel, and Travelstar, with sidewall treatments ranging from raised white letter to narrow and wide whitewalls. It is a useful size for owners who want broad product variety and a balance between truck stance and traditional street use.
31X10.50R15 uses flotation-style sizing, where 31 refers to approximate overall tire diameter in inches, 10.50 indicates section width, R marks radial construction, and 15 is the wheel diameter. For the 1991 Chevrolet Trucks Blazer, this size gives a taller and wider light truck presentation than the metric alternative while remaining on the same 15-inch rim diameter. The available option in this size is a BFGoodrich All-Terrain T/A KO2 with raised white letters, reinforcing its truck-oriented character. This size is worth considering when the Blazer already has the wheel width and clearance to support a larger overall tire package.
Tire fitment is straightforward across the covered 1991 Chevrolet Trucks Blazer sub-models because both Scottsdale and Silverado can use the same two radial tire sizes. Even so, checking the exact wheel and tire setup on the vehicle still matters before choosing between the standard metric size and the taller flotation-style option.
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1991 Chevrolet Trucks Blazer Scottsdale
The 1991 Chevrolet Trucks Blazer Scottsdale can use either 235/75R15 or 31X10.50R15, both in radial construction on 15-inch rims. That gives the owner a choice between a more traditional street-oriented metric fitment and a larger light truck tire format, so wheel width and overall stance should be confirmed before selecting a replacement.
The 1991 Chevrolet Trucks Blazer Silverado also uses 235/75R15 and 31X10.50R15 radial tires on 15-inch rims. Tire selection is less about trim level than the actual wheel-and-tire combination on the truck, along with whether the goal is a classic whitewall presentation or a more rugged raised white letter all-terrain look.
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 Chevrolet Trucks Blazer Tires for Sale
Available 1991 Chevrolet Trucks Blazer tire choices center on 235/75R15 and 31X10.50R15 radials from BFGoodrich, American Classic, Maxxis, Coker Classic, Tornel, and Travelstar. The main comparison points are sidewall style, tire series, all-terrain versus classic street presentation, and rim-width compatibility.
Common 1991 Chevrolet Trucks Blazer tire questions usually come down to choosing between 235/75R15 and 31X10.50R15, confirming 15-inch wheel fitment, and deciding which sidewall style or tire type best matches the vehicle’s appearance and intended use.
Tire Size & Fitment
What tire size fits a 1991 Chevrolet Trucks Blazer?
A 1991 Chevrolet Trucks Blazer uses two primary tire sizes: 235/75R15 and 31X10.50R15. Both are radial sizes built for 15-inch rims, and both Scottsdale and Silverado sub-models can use either size depending on the wheel-and-tire setup on the vehicle.
That means the key step is not choosing by trim name alone, but confirming what is already on the truck. A Blazer wearing stock-style street tires may use 235/75R15, while one set up with a taller light truck stance may use 31X10.50R15. Check the current tire size, wheel width, and available clearance before replacing one size with the other.
What size rim does a 1991 Chevrolet Trucks Blazer use?
The tire sizes used on a 1991 Chevrolet Trucks Blazer both fit a 15-inch rim. That applies to the 235/75R15 metric radial and the 31X10.50R15 flotation-style radial, so rim diameter stays consistent even though the tire formats are different.
Rim diameter is only one part of the fitment picture. A 31X10.50R15 typically calls for a wider wheel than many 235/75R15 applications, so the actual wheel width should be checked before changing sizes. Confirming the wheel dimensions already on the Blazer helps avoid choosing a tire that matches the diameter but not the wheel or vehicle setup.
Do all 1991 Chevrolet Trucks Blazer sub-models use the same tire size?
Scottsdale and Silverado versions of the 1991 Chevrolet Trucks Blazer share the same two primary tire sizes: 235/75R15 and 31X10.50R15. Both sub-models use radial construction, and both sizes are intended for 15-inch rims.
Shared fitment across sub-models makes the decision simpler, but it does not remove the need to inspect the truck itself. Many older Blazers have seen wheel changes, suspension work, or tire-size updates over time. Looking at the existing tire size and wheel dimensions is the best way to choose the right replacement for the vehicle as it sits today.
Choosing the Right Tire
What should I consider when choosing a 235/75R15 tire for a 1991 Chevrolet Trucks Blazer?
Start with the basic fitment details: 235/75R15 is a 15-inch radial size, and it is offered in several styles for the 1991 Chevrolet Trucks Blazer. Choices include all-terrain raised white letter designs as well as classic narrow and wide whitewall radials from several brands and tire series.
The right pick depends on how the Blazer is used and how it should look. A truck meant for traditional street driving may point toward a classic radial with whitewall styling, while a more utility-minded setup may lean toward an all-terrain tread. Wheel width also matters, since rim-width specifications vary across the available 235/75R15 products.
What sidewall styles are available for 1991 Chevrolet Trucks Blazer tires?
Sidewall choices for 1991 Chevrolet Trucks Blazer tires include raised white letter, narrow whitewall, and wide whitewall styles. Those appearance options are concentrated mostly in 235/75R15, while 31X10.50R15 is represented by a raised white letter all-terrain tire.
This gives the Blazer owner room to shape the truck’s visual character without changing the basic wheel diameter. A raised white letter tire tends to emphasize the truck and off-road side of the vehicle, while whitewalls create a more custom, cruiser, or restoration-oriented presentation. The best choice depends on whether appearance, utility, or a mix of both matters most.
What brands offer tires for the 1991 Chevrolet Trucks Blazer?
Tires for the 1991 Chevrolet Trucks Blazer are available from BFGoodrich, American Classic, Maxxis, Coker Classic, Tornel, and Travelstar. Most of that variety appears in 235/75R15, while 31X10.50R15 is available from BFGoodrich in an all-terrain raised white letter configuration.
Brand choice should be considered alongside tire series, sidewall treatment, and wheel compatibility rather than on name alone. Some options lean toward classic street presentation with whitewalls, while others emphasize truck styling and tread character. Comparing the available specifications within the correct size is the most useful way to narrow the field for your Blazer.
Restoration & Appearance
Which tire should I choose for a period-style 1991 Chevrolet Trucks Blazer?
A period-style 1991 Chevrolet Trucks Blazer can go in more than one visual direction. The 235/75R15 size offers the broadest appearance range, including narrow and wide whitewall radials as well as a raised white letter option, while 31X10.50R15 presents a more aggressive truck-oriented look.
The better choice depends on how the Blazer is being interpreted. A more street-focused or custom presentation may favor a whitewall radial, while a rugged utility style may suit the raised white letter all-terrain approach. For exact originality, compare the truck against period photos, build documentation, or marque-specific restoration references before settling on sidewall details.
How does tire construction affect the appearance of a restored 1991 Chevrolet Trucks Blazer?
Construction is simple on this application because the 1991 Chevrolet Trucks Blazer uses radial tires in both primary sizes. The visual difference comes less from radial versus bias-ply and more from the tire’s size format, sidewall treatment, and tread character.
That means appearance decisions center on whether the truck should look more like a clean street-driven full-size SUV or a more assertive 4x4. A 235/75R15 whitewall radial creates a very different impression than a 31X10.50R15 raised white letter all-terrain tire. Matching the tire’s proportions and sidewall style to the truck’s wheels and stance usually matters most.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 1991 Chevrolet Trucks Blazer?
Yes. Modifications can affect tire fitment on a 1991 Chevrolet Trucks Blazer even when the tire still mounts on a 15-inch rim. Aftermarket wheels, changes in wheel width, altered offset, suspension lifts, lowering, or body and steering changes can all influence whether 235/75R15 or 31X10.50R15 is the better match.
A taller and wider tire package needs more than the correct rim diameter to work properly. Clearance at the fenders, suspension components, and steering range should be checked carefully, especially on an older truck that may not be in original configuration. Looking at the complete wheel-and-tire setup is the safest way to avoid rubbing or mismatch problems.
What should I inspect before driving a 1991 Chevrolet Trucks Blazer on new tires?
Before driving a 1991 Chevrolet Trucks Blazer on new tires, inspect the wheels, valve stems, lug hardware, and the overall condition of the suspension and steering components. It also helps to confirm that the chosen tire size matches the wheel diameter and width being used on the truck.
Older utility vehicles often sit for long periods or have mixed replacement parts from past service. After installation, check air pressure, verify that the tires clear during full steering travel, and watch for any contact under normal suspension movement. A short, careful test drive followed by a second inspection can catch issues before regular road use begins.
How should tires on a collector 1991 Chevrolet Trucks Blazer be maintained?
Tires on a collector 1991 Chevrolet Trucks Blazer should be inspected regularly for air loss, uneven wear, cuts, bulges, and sidewall cracking. Even a lightly used truck can develop tire problems from age, long storage periods, or sitting in one position for extended stretches.
Consistent pressure checks and clean, dry storage conditions make a real difference on a vehicle that is not driven every day. Keeping the Blazer away from prolonged sunlight, excess heat, and ozone sources can help preserve the tires over time. Before a longer drive, give the tires a close visual inspection and verify that the spare is also roadworthy.
