Street Gear Poll
the only d70-14 I have found were 25.7, does that sound right?
I can't say one way or another, BUT if I had to give an opinion, I think that would be too tall.Ima thinking a D is about a 6.95 or 7.00. So let's say it's 7 inches. The 70 series means that the sidewall will be about 70% of the tread.Then you double that,(for top and bottom) and add the rim size of 14.
So here's the math; (7.00x .70x 2)+14 =23.8
S'a best I can guess
But here is a comparison for tires around 23.8 inchs tall; a 165/75-14 calculates to 23.75, a 195/65-14 might be 23.98, a 225/55-14 might be 23.74.Of these, the 195 is probably the closest in section width to the D. Ima guessing.
The problem is that the old system of lettered tires was based on the profile number being a percentage of the tread width(to my recollection); whereas with the Pmetric tires, the profile number is a percentage of the section width.The lettered tires had much more tread width for the section width, than do the radials. Said another way;tread for tread,and rim for rim, the radials have quite a bit more section width.
I remember my first pair of G60-14s. Onto my 1970 Swinger340. Back in about 71/72.Man did those tires look wide. The G was 8.25 inches of tread. It probably had an inch or a inch a quarter more of section width, so that would put it around 9.5 to 9.7 section width making it about a 240. Well todays radial tire of that size might have around a half inch less tread, so 7.75 inches. This is all from a 40 year old memory, so I can't testify as to the accuracy of my 63 year old brain. This one thing I know, grade twelve girls are as beautiful today, as I remember them being in 1972!
