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1968 DeVille Convertible (current project)
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Hi,
Does anyone know what tire size L78 15 converts to in modern radials?
I want the car to have the same ride height, etc. so the closest size conversion would be best. For 1967 DeVille. Thanks.
 
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Check this article you should be able to make the conversion, Mike

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=45

Here is a short clip from the article

To convert Alpha Numeric tires to P-metric sized tires, it is important to identify the original tire's aspect ratio. The 78-series Alpha Numeric tires should be replaced with today's 80-, or 75-series tires. If the vehicle was equipped with the low profile 70-, 60- or 50-series sizes, the P-metric substitution should be selected from the P-metric size column that offers the equivalent aspect ratio as the existing tire.
 
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