1958 Riley Two Point Six Tires

The 1958 Riley Two Point Six is associated with two tire sizes: 670-15 in bias-ply construction and 195R15 in radial construction. Both are 15-inch fitments, so the car’s tire choice can reflect either a traditional bias-ply setup or a radial setup, depending on how the car is equipped today.

The key is not assuming both apply the same way on every individual car without checking what is actually mounted. Many collector vehicles have been converted over time, so wheel size, current construction type, and available clearance should be confirmed before choosing between a 670-15 bias-ply replacement and a 195R15 radial replacement.

The 1958 Riley Two Point Six uses a 15-inch rim with both of its associated tire sizes. The bias-ply 670-15 and the radial 195R15 are both built around that same 15-inch wheel diameter, which keeps rim diameter simple even though tire construction can differ.

That does not mean every 15-inch wheel is automatically suitable for every tire choice. Rim width still matters, especially when comparing bias-ply fitments with radial alternatives, so it helps to verify the wheel width on the car before selecting a tire and to check that the new tire matches the wheel and body clearance available.

Yes. The 1958 Riley Two Point Six Base is associated with the same two tire sizes used on this model overall: 670-15 bias-ply and 195R15 radial. That means sub-model naming is not the deciding factor here in the way it can be on vehicles with multiple trim-specific wheel and tire packages.

The practical question is which setup your own car currently has and which direction you want to take it. A car kept closer to a period-style presentation may stay with 670-15, while a car already converted to radial construction may continue with 195R15 after wheel compatibility and general clearances are confirmed.

670-15 is the bias-ply tire size associated with the 1958 Riley Two Point Six. It uses the vintage numeric bias-ply sizing system, where the 670 designation refers to nominal section width and the 15 identifies the wheel diameter in inches.

That matters because a bias-ply tire affects both the car’s visual character and its overall setup. Owners choosing 670-15 usually compare sidewall style, brand, and series within the bias-ply group, while anyone moving away from that construction should verify wheel width, tire dimensions, and clearance rather than treating a radial equivalent as automatic interchangeability.

Radial equivalents for 670-15 include 195R15 as an 80-series metric radial, P205/75R15 as a P-metric 75-series radial, P215/70R15 as a P-metric 70-series radial, and 670R15 as a bias-look radial. Those options give the 1958 Riley Two Point Six owner several radial sizing paths tied to the original 670-15 bias-ply fitment.

Each option should be treated as an alternative to evaluate rather than a guaranteed substitute. The associated rim-width range is 5-7 inches, and it is smart to check wheel width, overall package size, steering clearance, and fender room before changing from 670-15 to any radial-equivalent format.

That depends on what matters most for your 1958 Riley Two Point Six. The 670-15 bias-ply size supports a more traditional vintage presentation, while 195R15 and the other radial equivalents tied to 670-15 give owners a radial-based path on the same 15-inch rim diameter.

Appearance goals, current wheel setup, and how the car is actually driven usually shape the decision. A restoration-oriented owner may prefer staying with 670-15, while a road-use-focused owner may consider a radial alternative, but the wheel width and vehicle clearances still need to be confirmed before changing construction.

Start with the fact that 670-15 is the bias-ply fitment associated with this car, then narrow the decision by appearance and wheel compatibility. Available 670-15 choices span blackwall, narrow whitewall, and wide whitewall designs, along with several brands and vintage-style series that change the look of the car noticeably.

It also helps to compare the wheel width on the car against the tire’s intended rim-width specification, since product fitment details are not identical across the full 670-15 assortment. Load figures and overall product character can matter as well, especially if the car is driven regularly rather than used mainly for display.

For the 1958 Riley Two Point Six, the available 670-15 bias-ply products include blackwall, narrow whitewall, and wide whitewall sidewall styles. That gives the car owner a meaningful appearance choice even when staying within the same primary size and traditional bias-ply construction.

The right sidewall treatment depends on the visual direction of the car rather than a one-style-fits-all rule. Blackwalls keep the presentation restrained, while whitewalls can create a more formal late-1950s look, so it is worth matching the tire’s sidewall style to the vehicle’s trim, stance, and restoration intent.

The 670-15 tire size for the 1958 Riley Two Point Six is available from Firestone, US Royal, Coker Classic, Universal Vintage Tire, BFGoodrich, Excelsior, Avon, Goodyear, and STA. Those brands appear across several bias-ply series and sidewall treatments, giving the owner more than one period-style direction to consider.

Choosing among them is less about ranking one brand over another and more about matching the tire to the car’s needs. Sidewall style, series character, rim-width specification, load details where stated, and the overall look you want on the finished car are the more useful comparison points.

For a period-style 1958 Riley Two Point Six, the 670-15 bias-ply size is the natural starting point because it preserves the vintage numeric sizing format and traditional construction associated with the car. Within that size, the visual result can still vary quite a bit depending on whether the tire is a blackwall, narrow whitewall, or wide whitewall.

A restoration-oriented choice should reflect the specific look you want the car to present rather than assuming every 670-15 tire creates the same effect. When exact historical authenticity matters, period photos, marque references, and vehicle-specific documentation are worth checking before settling on a sidewall style or brand presentation.

Tire construction changes the visual character of a restored 1958 Riley Two Point Six more than many owners expect. A 670-15 bias-ply tire typically maintains the car’s traditional vintage tire look, while a radial such as 195R15 can shift the presentation toward a more modern appearance even when the wheel diameter remains 15 inches.

That visual difference is one reason construction choice belongs in the restoration plan early. Owners trying to preserve a stronger period impression often stay with bias-ply, while those balancing vintage style with a radial-based setup may look at radial equivalents or a bias-look radial after confirming wheel width and overall fitment.

Yes. Modifications can affect tire fitment on a 1958 Riley Two Point Six even when the tire size itself is correct on paper. Changes such as aftermarket wheels, different wheel widths, altered offset, suspension work, or body and fender modifications can all influence whether a 670-15 or 195R15 setup has the clearance it needs.

That is especially important on collector cars that may have been changed decades ago. A careful fitment check should include wheel diameter, wheel width, sidewall-to-body clearance, and steering clearance, particularly if the car is being converted from bias-ply to radial construction or returned to a more traditional setup.

Before driving a 1958 Riley Two Point Six on new tires, inspect the wheels, valve stems, and general mounting condition, then confirm that the tire size matches the car’s intended setup. It also makes sense to look over suspension and steering components, since worn parts can affect how a new tire feels and tracks on the road.

A short first drive should focus on clearance, straight-line behavior, and any sign of rubbing under steering input or suspension movement. Tire pressure should be set appropriately for the tire being used, and any vibration, pull, or unusual contact marks deserve attention before the car is taken on a longer outing.

670-15 tires on a collector 1958 Riley Two Point Six should be inspected regularly for cracking, bulges, cuts, uneven wear, and loss of air pressure, especially if the car spends more time stored than driven. Collector cars often accumulate age faster than mileage, so condition matters just as much as tread depth.

Storage habits also make a difference. Keeping the car away from prolonged sunlight, excess heat, moisture, and ozone sources helps preserve the tires, and periodic pressure checks are worthwhile even when the car is not in regular use. A thorough inspection before each driving season is a sensible routine for any low-use vintage saloon.