Locomobile 86 Tires
Locomobile 86 belongs to the last chapter of one of America's early prestige automobile makers, built in 1929 as the industry had fully moved into modern balloon-tire motoring. Cars from this period combine late pre-war engineering with styling and road manners that feel markedly different from brass-era machines, which makes tire choice more than a simple year lookup. Locomobile 86 is especially tricky because two different sizes appear for the same model year, and one of them uses an older-style diameter-by-section code that can be misread as a wheel size. The first step is to confirm whether the car carries 18-inch rims before choosing a tire.
Locomobile 86 Tire Size Guide
Locomobile 86 uses 2 distinct tire sizes across the 1929 model year. One of those sizes, 30X6.20, uses the older antique diameter-by-section format, where the leading number is the tire's outside diameter rather than the wheel diameter. That matters because 650-18 clearly identifies an 18-inch rim, while antique-format sizes require the rim diameter to be confirmed separately on the actual wheel.
30X6.20 is an antique-format size listed for 1929 Locomobile 86 applications. The 30 means the tire's approximate outside diameter in inches, while 6.20 is the nominal section width; the wheel diameter is not stated in the size code and must be confirmed on the car. Choose this size only after verifying the wheel and overall fitment details, and because it is an antique-style bias application, a tube is required.
650-18 is a numeric bias-ply size used on 1929 Locomobile 86 applications. The 650 indicates a nominal 6.50-inch section width and the 18 is the rim diameter, with the available products built for 18-inch rims and 3.25 to 3.50-inch rim widths. Choose this size if the car is equipped with 18-inch wheels and you want a period-correct balloon-style fitment; a tube is required.
Locomobile 86 Tires by Year
The year listing breaks Locomobile 86 tire fitments down by model year so you can match the car to the correct size before moving on to product selection. In 1929, two sizes are listed, so the wheel and overall configuration need to be checked on the specific car. The leading number in 30X6.20 is the tire's outside diameter, not the wheel size, while 650-18 is an 18-inch rim fitment.
1929 Locomobile 86
- 30X6.20
- 650-18
Best Locomobile 86 Tires for Sale
Available Locomobile 86 tires cover 1 listed size with 2 products from 1 brand, including blackwall and wide whitewall options. Confirm the exact size on the car and the rim diameter before selecting.
650-18 Products
These are the available products for 650-18.
Frequently Asked Questions
The FAQ below addresses the exact questions Locomobile 86 owners usually face: how to sort out the two 1929 tire sizes, what the antique-style size code means, which products are available, and how to care for a low-use pre-war collector car on bias-ply tires.
Size Basics & Fitment
Locomobile 86 uses two tire sizes in 1929: 30X6.20 and 650-18. The 650-18 size fits an 18-inch rim, and the available products for that size are bias-ply balloon tires built for 3.25 to 3.50-inch rim widths. The 30X6.20 size is an antique-style diameter-by-section code, so its leading number refers to overall tire diameter rather than wheel diameter.
That means a 1929 Locomobile 86 owner should not rely on the model year alone. Check the size marking on the existing tire if it is readable, then verify the wheel itself before choosing between the two listings. On cars that have been restored or re-wheeled over time, that extra step prevents ordering a tire that matches the year but not the actual rim.
On a Locomobile 86, 30X6.20 is an antique diameter-by-section size. The 30 refers to the tire's approximate outside diameter in inches, and the 6.20 refers to nominal section width. It does not identify the wheel diameter, which is why the code can be misleading to a modern buyer who expects the last number to be the rim size.
A Locomobile 86 owner using this size should confirm the wheel diameter from the actual rim before moving forward. That is especially important on a pre-war luxury car, where running changes, later repairs, or restoration choices may leave the car wearing a different wheel than expected. Because this is an antique-style bias application, inner tubes are part of the correct setup.
A 1929 Locomobile 86 has two tire sizes listed because the model year includes both an antique-style diameter-by-section size, 30X6.20, and a numeric balloon size, 650-18. That split points to a same-year configuration difference rather than a simple year-to-year change. One size clearly identifies an 18-inch rim, while the other requires the rim to be confirmed separately.
For the owner, the practical takeaway is that the specific car matters more than the calendar year. Start with the wheel diameter, then compare the existing tire markings and the wheel width if known. If the car is a restoration, it is also worth checking old photos, surviving paperwork, or marque expertise to see whether the present wheels match the car's earlier configuration.
Locomobile 86 tire applications in the listed sizes are bias-ply and use period-style sizing, which means inner tubes are required. That applies to the 650-18 balloon tire products and also to the antique-style 30X6.20 application. Tube use is part of the normal setup for collector tires of this type and era.
When fitting tires to a Locomobile 86, tubes should be treated as part of the complete assembly rather than an optional add-on. The wheel condition matters as well, especially on an older car where rust, old paint buildup, or rough surfaces can chafe a tube over time. Before mounting new tires, inspect the rim carefully and make sure the wheel is suitable for fresh tube installation.
Buying the Right Tire
The correct way to confirm a 1929 Locomobile 86 tire size is to identify the wheel and the existing size marking together. The year alone is not enough, because both 30X6.20 and 650-18 are listed for 1929. If the car wears 18-inch rims and falls within the available product range, 650-18 is the directly supported modern listing among the current products.
Begin at the wheel, not the sidewall code alone. Measure the rim diameter, check the tire size stamped or molded on any surviving tire, and compare that with restoration records if the car has been apart. That approach is much more reliable on a Locomobile 86 than assuming every 1929 example was equipped exactly the same way after nearly a century of service and restoration.
Locomobile 86 products in the listed 650-18 size are available in both blackwall and wide whitewall form. Both are Firestone Balloon bias-ply tires, with one version carrying a 3.50-inch whitewall and the other using a black sidewall. Those choices give an owner the option to match the car's presentation more closely without changing size.
A blackwall generally suits a more restrained, utilitarian, or earlier look, while a wide whitewall creates a more formal late-1920s appearance that many luxury-car restorations favor. The right answer for a Locomobile 86 depends on how the specific car is being restored and presented. Period photos, marque literature, and judging standards are the best references when appearance matters as much as fitment.
The listed Locomobile 86 tire products are from Firestone. Both currently shown products are 650-18 Firestone Balloon bias-ply tires, offered in blackwall and wide whitewall sidewall styles. No additional brands appear in the available product set for this model page.
For a Locomobile 86 owner, that means the key buying decision is less about comparing multiple manufacturers and more about confirming the correct size and choosing the sidewall presentation that suits the car. If your car requires 30X6.20 rather than 650-18, the first task is to verify that fitment carefully, since the available product assortment shown here centers on the 18-inch balloon application.
Maintenance & Longevity
A Locomobile 86 should be stored in a cool, dry, dark space with the tires kept away from direct sunlight, ozone sources, and prolonged contact with standing moisture. Clean floors, moderate temperature swings, and proper inflation help reduce sidewall stress and flat spotting. On a pre-war car with bias-ply tires and tubes, storage conditions matter more than annual mileage alone.
If the Locomobile 86 sits for long periods, move it occasionally to change the tire contact patch or use appropriate supports to reduce constant load on one spot. Avoid parking with severely underinflated tires, since that can stress the casing and tube. A collector car that looks fine at a glance can still age its tires quickly if it lives in a hot garage or near electric motors and compressors.
Tires on a Locomobile 86 should be inspected before each drive and given a more thorough review at regular intervals even if the car sees very little road use. Bias-ply collector tires deserve close attention to cracking, cuts, bulges, irregular wear, valve condition, and any signs of tube-related air loss. A pre-war car can spend months parked and still develop tire issues simply through age and environment.
The practical routine is simple: look at the sidewalls, verify inflation, and examine the tread and bead area before moving the car. Any vibration, pull, or unusual ride feel during a short outing should prompt another inspection afterward. On a Locomobile 86, early detection is especially important because tire problems on older heavy vehicles can escalate quickly once the car is in motion.
A Locomobile 86 tire should be replaced when age, cracking, casing distortion, persistent air loss, impact damage, or other structural concerns appear, even if the tread still looks usable. Collector-car tires often age out before they wear out, and that is particularly true of pre-war fitments that live long, low-mileage lives. Tread depth alone is not a dependable measure of serviceability on this kind of car.
Any Locomobile 86 that has spent long periods parked should have its tires judged by condition rather than mileage. If the car carries an older period tire of uncertain history, especially one stored for decades, specialist evaluation is wise before any meaningful road use. Replacing an aged tire early is usually far less costly than dealing with body, wheel, or mechanical damage after a failure.
Restoration & Authenticity
Locomobile 86 is associated here with two period-appropriate size conventions for 1929: 30X6.20 and 650-18. The available products shown under that fitment range are Firestone Balloon bias-ply tires in 650-18, which aligns with late-1920s balloon-tire practice. Because more than one size is tied to the same model year, the specific original setup should be matched to the individual car rather than assumed from the model name alone.
For restoration work, the best path is to compare the car's current wheels with any surviving factory literature, period photos, and marque records tied to that exact chassis or body configuration. A Locomobile 86 judged at a high level may be expected to wear a size and sidewall style consistent with its original presentation. Authenticity begins with the right wheel and tire relationship, not just the right brand name.
Correct tire fitment can absolutely affect the presentation, judging outcome, and market perception of a Locomobile 86. On a rare pre-war luxury automobile, the wrong overall diameter, sidewall treatment, or wheel-to-tire proportion can change the car's stance and visual authenticity immediately. Judges and informed buyers often notice tire details because they sit at the intersection of safety, usability, and historical correctness.
That does not mean every Locomobile 86 must be restored for concours use, but it does mean tire choice should match the goal of the car. A touring driver may prioritize dependable period-style construction, while a show car may need closer attention to sidewall appearance and exact size convention. Marque clubs, period photographs, and event judging standards are the best references when authenticity directly affects value.
Locomobile 86 products in 650-18 are offered with blackwall and wide whitewall sidewall styles. Either can suit a late-1920s restoration depending on how the specific car was originally presented and how formal the finished look is meant to be. The size and construction remain the same, so the sidewall decision is mainly about authenticity and appearance rather than basic fitment.
A blackwall Locomobile 86 usually gives a more restrained and understated presentation, while a wide whitewall tends to emphasize the car's prestige and period flair. If the car is being restored for judging, use period images or factory literature to match what belongs on that particular example. On a significant automobile like Locomobile 86, sidewall style can influence the whole visual character of the finished restoration.
Safety & Road Use
Properly selected and correctly fitted collector tires can be suitable for public-road use on a Locomobile 86, but they should be treated as vintage-style bias-ply equipment rather than modern high-speed touring tires. The listed products for the supported size are period-style Firestone Balloon bias-ply tires, and the car itself is a late-1920s pre-war automobile with braking, steering, and suspension behavior far removed from modern traffic norms.
That means a Locomobile 86 should be driven conservatively and only after the entire chassis is in sound condition. Tire choice is only one part of roadworthiness; wheel condition, brake performance, steering play, and alignment matter just as much. A careful owner treats road use as a system-level question, with the tires matched to the car and the car matched to the pace of safe vintage motoring.
Before driving a Locomobile 86, check tire inflation, visible sidewall condition, valve stems, wheel security, and any signs of rubbing or uneven wear. On a car using bias-ply tires and tubes, a slow loss of pressure or a fresh sidewall crack deserves attention before the car moves. It is also smart to look at the spare, since older touring and show cars often depend on it more than modern vehicles do.
A Locomobile 86 should also be treated as a complete mechanical system, so tires are only part of the pre-drive inspection. Brakes, steering response, fluid levels, and wheel bearings all deserve attention before any road outing. If the car has been sitting, take the first drive gently and briefly, then recheck the tires and wheels afterward for heat, pressure change, or any new signs of distress.
A Locomobile 86 should be driven at moderate speeds that respect both the vehicle's age and the characteristics of vintage-style bias-ply tires. Even when the tires are new, they are meant to preserve period handling and appearance rather than duplicate modern radial stability at highway pace. Appropriate speed is shaped as much by the car's brakes, steering, and road conditions as by the tire itself.
In practice, a Locomobile 86 owner should favor smooth secondary-road driving over sustained fast traffic, especially if the car is freshly restored or has not been exercised regularly. Build speed gradually, pay attention to wandering or vibration, and leave generous stopping distance. A pre-war luxury car can feel composed within its intended range, but it rewards a measured pace and punishes modern-driver assumptions.