Finding the Perfect Fit

A Vintage Tyre Conversion Guide

Whether you're restoring a classic car or simply replacing worn-out tyres, finding the right size can be a challenge. Vintage vehicles often used unique sizing conventions, such as "numeric" (e.g., ) or "alpha-numeric" (e.g., ) systems, which can be confusing to translate to today's standard "P-metric" (e.g., ) radial sizes.

This chart is designed to serve as a practical guide for converting your car's original cross-ply or bias-ply tyre sizes to a modern radial equivalent. Modern radial tyres offer significant advantages in handling, safety, and longevity, making them a popular choice for vehicles that will be driven regularly.

While this guide provides close approximations, it is not a substitute for professional advice. Always check the physical dimensions, including the overall diameter and section width, and consult with a tyre professional to ensure proper fitment for your specific vehicle and wheels.

Vintage to Modern Tyre Size Conversion Chart

Vintage (Cross-Ply) Size

Vintage (Alpha-Numeric)

Modern (P-Metric) Equivalent

13-inch Rim

5.60−13

A78-13

or

6.00−13

B78-13

or

6.40−13

C78-13

or

7.25−13

D78-13

or

14-inch Rim

5.90−14

B78-14

or

6.50−14

C78-14

or

7.00−14

E78-14

or

7.50−14

F78-14

or

8.00−14

G78-14

or

8.50−14

H78-14

or

15-inch Rim

5.90−15

A78-15

or

6.40−15

E78-15

or

6.70−15

F78-15

or

7.10−15

G78-15

or

7.60−15

H78-15

or

8.20−15

L78-15

or

16-inch Rim

6.00−16

-

P185/85R16

6.50−16

-

P195/85R16

Drive with Confidence

Your vintage car is a work of art, and it deserves the right foundation. While our chart provides a great starting point, our specialists can offer personalized advice to ensure your new tyres are the perfect fit for both performance and authenticity.

Contact us today to speak with a tyre expert and ensure your classic is ready for every journey.

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