1987 GMC Vans G3500 Tires

The 1987 GMC Vans G3500 uses two primary tire sizes: 875-16.5 in bias-ply construction and 8.75R16.5 in radial construction. The correct one depends on the exact sub-model and GVWR, with some Rally, Rally STX, and Vandura versions using only one size while certain 8600-GVWR versions can use either fitment.

The key step is identifying the van exactly as equipped before ordering tires. Nameplate alone is not enough on this model, because Rally, Rally STX, and Vandura versions do not all follow the same pattern. Checking the current tire sidewall, wheel diameter, and door-jamb or vehicle information labeling helps confirm whether the van should stay with its present construction.

Both primary tire sizes used on the 1987 GMC Vans G3500 are built for a 16.5-inch rim. That applies to the 875-16.5 bias-ply size and the 8.75R16.5 radial size, so wheel diameter stays consistent even though construction and exact fitment vary by sub-model and GVWR.

A shared rim diameter does not mean every tire choice is interchangeable across all vans in the lineup. Construction type still matters, and older vans are often changed over time through service replacements or wheel swaps. Measuring the wheel and comparing the current tire markings before replacement is the safest way to avoid choosing the right diameter but the wrong overall fitment.

The 1987 GMC Vans G3500 has more than one tire size because fitment changes across Rally, Rally STX, and Vandura versions and also shifts with GVWR. Some configurations use only 875-16.5 bias-ply, some use only 8.75R16.5 radial, and several 8600-GVWR models are associated with both constructions.

That means tire selection starts with vehicle identification rather than product preference. A van that has spent years in commercial use may also have been refitted with replacement wheels or a different construction than it originally carried. Confirming the sub-model, GVWR, and actual wheel-and-tire setup on the van helps narrow the decision before comparing brands or tread series.

On the 1987 GMC Vans G3500, 875-16.5 is a bias-ply tire size. It is used on several Rally and Rally STX configurations and also appears on certain 8600-GVWR versions that can be associated with either the bias-ply 875-16.5 or the radial 8.75R16.5 fitment.

That distinction matters because bias-ply and radial tires do not present the same construction even when they share the same 16.5-inch rim diameter. Owners trying to preserve a traditional van or commercial-truck appearance often want to stay with the bias-ply format, while others first need to verify whether the van is already set up around the alternate radial fitment before making a change.

The right answer depends on the exact 1987 GMC Vans G3500 configuration and on whether the van’s primary fitment is 875-16.5 bias-ply or 8.75R16.5 radial. Some versions use one construction only, while several 8600-GVWR models are tied to both fitments, making the van’s present setup especially important to verify.

Bias-ply construction usually appeals to owners who want a period-style heavy-duty look, while radial construction may better match a van already equipped that way. The practical step is to inspect the current tire markings, wheel size, and overall clearance before changing construction. On older vans, service history and wheel changes can matter just as much as the model name on the badge.

Before converting a 1987 GMC Vans G3500 from bias-ply to radial tires, confirm that the van is one of the configurations associated with the 8.75R16.5 radial fitment. The wheel diameter must remain 16.5 inches, and the actual wheel condition, width, and existing tire setup should all be checked before treating the radial size as a workable alternative.

A conversion decision should also include inspection of steering clearance, suspension condition, and body or fender space, especially on a van that may have seen decades of commercial use or later modifications. Tire age and wheel integrity matter as much as size. If the van has aftermarket wheels or altered ride height, the change needs to be evaluated on the vehicle rather than assumed.

Start by confirming that 875-16.5 is the correct primary fitment for the exact 1987 GMC Vans G3500 sub-model and GVWR. Once that is established, the main selection points are staying with bias-ply construction, matching the 16.5-inch wheel, and comparing the available truck-oriented tire series offered in this size.

Within 875-16.5, the available options differ by series character, weight, and intended presentation rather than by dramatic cosmetic variety. An owner restoring a traditional van may prioritize period-style appearance, while a work-focused vehicle may center more on tread type and general use. Wheel condition and the van’s actual service demands should be checked before making the final choice.

For the 875-16.5 fitment on the 1987 GMC Vans G3500, available products come from STA. The current choices in that size include truck-oriented bias-ply offerings within the Traxion and Transport Highway series, both built for the 16.5-inch application and both presented in Blackwall form.

Brand selection here is less about comparing a large field and more about choosing the right series within the proper size and construction. Once the sub-model and tire size are confirmed, the buyer can look at whether the van’s use leans toward a more traditional highway-style presentation or a more work-oriented tread approach. Correct fitment still comes before brand preference.

The 875-16.5 bias-ply fitment for the 1987 GMC Vans G3500 is available in the STA Traxion and STA Transport Highway series. Both are Blackwall truck tires for 16.5-inch applications, but they give the buyer two distinct series choices within the same primary size rather than forcing a single-pattern replacement.

That matters most once the van’s exact fitment has already been confirmed. Tire series helps shape the overall look and intended character of the replacement, especially on a heavy-duty van that may be restored, preserved, or still used for practical hauling. Comparing the series alongside construction, wheel condition, and how the van will actually be driven leads to a better decision.

A period-style 1987 GMC Vans G3500 starts with using the correct primary size and construction for the exact sub-model. On vans that use 875-16.5, the bias-ply format preserves the traditional heavy-duty look associated with these late full-size GMC vans, while radial-equipped versions should be identified carefully before changing the tire type.

For a restoration-oriented build, appearance should be matched to the van’s role as well as its fitment. A passenger-oriented Rally may call for a different visual goal than a work-focused Vandura, even when both use 16.5-inch wheels. If exact originality matters beyond general period style, marque-specific photos and historical references are the right next step before choosing the final tire series.

Tire construction changes the visual character of a restored 1987 GMC Vans G3500 as much as the size itself. A bias-ply 875-16.5 setup presents the van with a more traditional, commercial-duty look, while an 8.75R16.5 radial setup reflects the later-era shift toward radial construction on certain heavier configurations.

That visual difference matters on a van with broad, upright body sides and exposed tire profile. Even when the rim diameter remains 16.5 inches, the construction you choose affects whether the van reads as work-truck traditional or more updated for late-1980s road use. Restorers should settle the fitment question first, then choose the construction that matches the project’s intended story.

Yes, modifications can affect tire fitment on a 1987 GMC Vans G3500 even when the replacement tire carries one of the correct 16.5-inch size designations. Aftermarket wheels, suspension changes, altered ride height, brake conversions, or body repairs can all change the space available around the tire and influence whether the original-style fitment still makes sense.

A van with decades of use may not still be in stock configuration, especially if it served commercial duty or was converted for specialty use. Checking wheel width, wheel condition, steering travel, and clearance at the fender and suspension points helps prevent surprises. That inspection becomes even more important before switching between the bias-ply and radial fitments tied to this model.

Before driving a 1987 GMC Vans G3500 on new tires, inspect the wheels for damage, confirm the bead seats are appropriate for the 16.5-inch fitment, and make sure the chosen tire size matches the van’s sub-model and GVWR. Lug hardware, valve stems, and overall wheel condition also deserve attention on an older heavy-duty van.

The rest of the check should focus on basic roadworthiness: proper inflation, even seating, steering clearance, and enough space at the suspension and body through a full turn. It also helps to inspect the van’s suspension and alignment condition, since worn components can create handling issues that get blamed on the tires. A short, cautious test drive is a sensible final step.

875-16.5 tires on a collector 1987 GMC Vans G3500 should be kept properly inflated, inspected regularly for cuts, bulges, cracking, and irregular wear, and protected from long periods of sun, heat, and ozone exposure. Collector vans often age out tires by time and storage conditions rather than by heavy mileage alone.

Routine checks matter because a full-size van places visible demands on its tires even when it is driven only occasionally. Looking over the sidewalls before each outing and watching for slow air loss can catch problems early. Storage on a clean, dry surface and periodic movement of the vehicle also help reduce flat-spotting and prolonged stress in one contact patch area.