1973 Chevrolet Suburban Tires

A 1973 Chevrolet Suburban can use 700-15, G78-15, L78-15, H78-15, 650-16, 875-16.5, 950-16.5, 750-16, 700-16, or LR78-15, depending on the exact C10, C20, K10, or K20 configuration and GVWR. Most of these are bias-ply sizes, while LR78-15 is a radial fitment tied to one K10 4x4 application.

The important step is matching the tire to the exact Suburban series and wheel diameter rather than choosing by appearance alone. A 15-inch, 16-inch, or 16.5-inch setup changes the fitment path immediately, and some heavier-duty models also split by front, rear, or GVWR-specific applications.

The 1973 Chevrolet Suburban uses three rim diameters across its fitments: 15-inch, 16-inch, and 16.5-inch. The tire size determines which one applies, with sizes such as 700-15, H78-15, L78-15, and LR78-15 on 15-inch rims, 650-16, 700-16, and 750-16 on 16-inch rims, and 875-16.5 or 950-16.5 on 16.5-inch rims.

That makes wheel confirmation essential before choosing a replacement tire. A 16.5-inch wheel is not the same as a 16-inch wheel, and many Suburbans have lived long working lives where wheels may have been changed, swapped, or mixed across axle positions.

The 1973 Chevrolet Suburban was offered in multiple two-wheel-drive and four-wheel-drive versions, with different GVWR ratings and heavy-duty combinations, so tire size changes with the truck's exact configuration. That is why the range includes light-duty 15-inch sizes, 16-inch utility sizes, 16.5-inch heavy-duty truck sizes, and one LR78-15 radial application.

A buyer should treat the Suburban nameplate as a starting point, not the final fitment answer. Checking the exact C10, C20, K10, or K20 sub-model and then verifying the wheel diameter on the vehicle keeps the selection process accurate and prevents chasing the wrong size family.

LR78-15 is a radial fitment for a specific 1973 Chevrolet Suburban K10 4x4 application. It uses the vintage alphanumeric radial format, and the available LR78-15 product is a Firestone Wide Oval Radial built with a bias-look radial presentation rather than a conventional modern radial appearance.

That distinction matters because LR78-15 is not simply another bias-ply size with a different label. A Suburban owner considering this fitment should verify the 15-inch wheel setup, compare it against the vehicle's intended use, and make sure the truck's overall wheel and clearance combination suits a radial-type tire.

For a 1973 Chevrolet Suburban, G78-15 has radial equivalents in 205R15, P215/75R15, P225/70R15, and 710R15. H78-15 can be compared to 215R15, P225/75R15, P235/70R15, and 760R15. L78-15 maps to 235R15, P235/75R15, P255/70R15, and 820R15, with each size family also carrying a 6 to 8 inch recommended rim-width range.

Those options represent different radial formats, from metric 80-series sizing to 75-series and 70-series P-metric alternatives, plus bias-look radials that keep a more vintage presentation. Even with an equivalent available, wheel width, dimensions, and clearance should still be checked on the actual Suburban before changing construction.

Start by confirming that the Suburban's original bias-ply size actually has a radial equivalent in the same general fitment family. G78-15, H78-15, and L78-15 each have stated radial alternatives, and the recommended rim-width range shown for those equivalents is 6 to 8 inches.

The next step is checking the truck itself rather than assuming every equivalent will suit every setup. Wheel width, wheel diameter, steering travel, suspension condition, fender clearance, and any aftermarket wheel or ride-height changes should all be reviewed before making a bias-ply-to-radial switch.

The first decision is the exact fitment: sub-model, GVWR, wheel diameter, and the proper size family for that truck. A 1973 Chevrolet Suburban can fall into 15-inch, 16-inch, or 16.5-inch tires, and some K10 versions also bring radial versus bias-ply construction into the choice.

After that, look at how the truck will be used and how it should look. Some sizes lean toward whitewall passenger-style options, while others center on blackwall truck, military, traction, or highway series, so the right selection depends on whether the Suburban is restoration-minded, utility-oriented, or both.

Sidewall choices for 1973 Chevrolet Suburban tires include blackwall, wide whitewall, narrow whitewall, and dual-white-stripe, depending on the exact size. The broadest decorative variety appears in several 15-inch and 16-inch sizes, while many 16.5-inch heavy-duty truck sizes remain strictly blackwall.

That makes sidewall selection partly a fitment issue and partly an appearance decision. A lighter-duty Suburban on 15-inch or some 16-inch sizes may support a more dressed period-style look, while a heavier C20 or K20 setup often points toward a more functional truck-sidewall presentation.

Tires for the 1973 Chevrolet Suburban are available from Firestone, BFGoodrich, Coker Classic, STA, Lester, Goodyear, Garfield, Tornel, Avon, and Excelsior, depending on size. Brand availability changes by fitment, so a 650-16 Suburban has a very different product spread than a 950-16.5 or LR78-15 truck.

The practical way to use brand choice is as a comparison within the correct size, not as the first filter. Once the Suburban's wheel diameter and tire size are confirmed, the buyer can compare brands by sidewall style, tire series, construction type, and other specifications that matter to the truck's intended use.

A period-style 1973 Chevrolet Suburban tire starts with the exact size and wheel diameter used by the truck's sub-model, then narrows to a bias-ply or radial-style product that suits the desired presentation. Many of the available 15-inch and 16-inch choices keep a traditional look, while LR78-15 offers a bias-look radial alternative on one K10 application.

Appearance goals should be balanced with how the Suburban will actually be used. A truck being restored for shows may lean toward classic whitewall or plain blackwall bias-ply choices, while a driver-focused build may lead the owner to compare radial-style options where that fitment exists.

Tire construction influences both stance and visual character on a restored 1973 Chevrolet Suburban. A bias-ply tire usually preserves the more traditional vintage truck look associated with these size formats, while the LR78-15 radial option brings a radial construction with a bias-look presentation for one K10 fitment.

That means construction is not only a driving decision but also an appearance decision. Buyers chasing a restoration-oriented result should confirm the exact size first, then compare sidewall treatment and tire series carefully, especially if the goal is a truck that still reads as authentically seventies in profile.

Yes, modifications can affect tire fitment on a 1973 Chevrolet Suburban, especially because the model already spans 15-inch, 16-inch, and 16.5-inch wheel families. Aftermarket wheels, changed wheel widths, suspension lifts or lowering, and axle-specific wheel swaps can all change which size works safely and which tires clear properly.

A modified Suburban should be measured as it sits now rather than matched only to the original sub-model listing. Wheel diameter, rim width, steering clearance, and fender room all deserve a careful look before choosing a replacement tire, particularly on K-series trucks or heavier-duty C20 and K20 setups.

Before driving a 1973 Chevrolet Suburban on new tires, inspect the wheels for correct diameter and condition, confirm lug hardware and mounting surfaces, and verify that the selected size matches the truck's actual configuration. It also helps to look over brakes, steering components, shocks, springs, and alignment-related wear before road use.

Once the tires are mounted, check inflation, turning clearance, and body or suspension clearance at ride height. A short, careful road test is a smart final step, especially on an older Suburban that may have seen wheel changes, long storage periods, or uneven wear from earlier suspension issues.

Collector tires on a 1973 Chevrolet Suburban should be maintained with regular pressure checks, visual inspection of tread and sidewalls, and periodic evaluation for cracking, bulges, cuts, or slow air loss. Vintage trucks that are driven infrequently deserve extra attention because age and storage conditions can matter as much as miles.

Storage habits also make a difference. Keeping the Suburban away from prolonged sunlight, moisture, heat, and ozone sources can help preserve tire condition, and it is wise to inspect the truck before each outing if it sits for extended periods between drives.