ConcoursMustang Forums
1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1970 Mustang => Topic started by: fastfret7 on May 10, 2014, 05:18:47 PM
-
What radial tire best matches the F-70 WSW Polyglas tire that came on the 1970 14x7 steel wheels?? I see some are saying 205/75/r14 and 215/70/r14
Again, thanks for everything!!!
-
I have 205's on the front and 235's on the rear, works quite well.
-
I have 215 70 r14s on the 69 conv and they look right to me
Bob
-
I'm going to disagree with everyone and say 225-70-R14. Just do the math - the best info I could find identified the diameter of an F70x14 tire as 26.2". The modern equivalent that comes closest to that size (26.402" diameter) is 225-70-R14.
The formula is diameter = ((2 * tire-width * aspect ratio) / 25.4 ) + wheel rim size. Plugging in 225-70-14 you get ((2 * 225 * .7) / 25.4 ) + 14 = 26.402. Other diameters for comparison:
205-70-R14: 25.299"
215-70-R14: 25.85"
-
Scott is basically very correct, I had done the same calculations when radials first became vogue. I used the setup I have because my car has no power steering, making a slightly narrower tire more appealing while diameter of the front tires is inconsequential. I wanted a bit more traction on the back so for daily driving and an occasional smack of the firewall I went with the 235's on the back with a speedo drive gear change. The car steers easier, and has a good bit more traction for daily driving and an occasional pounding of the gas pedal.
-
the best info I could find identified the diameter of an F70x14 tire as 26.2". The modern equivalent that comes closest to that size (26.402" diameter) is 225-70-R14.
So one really good burnout will make the back tires just about perfect.......... ;D
-
I'm going to disagree with everyone and say 225-70-R14. Just do the math - the best info I could find identified the diameter of an F70x14 tire as 26.2". The modern equivalent that comes closest to that size (26.402" diameter) is 225-70-R14.
The formula is diameter = ((2 * tire-width * aspect ratio) / 25.4 ) + wheel rim size. Plugging in 225-70-14 you get ((2 * 225 * .7) / 25.4 ) + 14 = 26.402. Other diameters for comparison:
205-70-R14: 25.299"
215-70-R14: 25.85"
Scott,
The OP referenced 14x7 wheels for his 1970. I believe the 1969 originals were 14x6. Will the 215-70-R14 work on a 14x6 wheel? I ask because I'll be looking for tires for my '69 pretty soon.
Thanks
-
Scott,
The OP referenced 14x7 wheels for his 1970. I believe the 1969 originals were 14x6. Will the 215-70-R14 work on a 14x6 wheel? I ask because I'll be looking for tires for my '69 pretty soon.
Thanks
I don't know. What size was the original tire?
-
Scott: Mikes car was a typical Mach l and came with 14/6 rims covered with F70-14 no size white letter Goodyear Polyglas tires.
-
Understood, I still don't know which of these tires will fit on a 14x6 wheel. I'm using 225-70-R14 radials on my 14x7 styled steel wheels and they fit just fine. Your local tire shop should be able to tell you if any of these will fit a narrower wheel.
-
Scott: I thought all wheels other than the boss 9's & magnums with the F60-15 tires used six inch rims. Styled steels measure six inches on the beads but seven to the outside. A seven inch would have been a bit wide for an F70-14, but good for a 60 series. Maybe I've got my numbers screwed up, have to correct if so.
-
Scott: I thought all wheels other than the boss 9's & magnums with the F60-15 tires used six inch rims.
The standard 1970 Mach 1 wheel was 14x7, as were the optional styled steel wheels. Other 1970 Mustangs used 14x5, 14x6, or 15x7 wheels depending on the specific application.
-
I cannot find any 225-70-R14 wsw... Does any know a specific tire I should be looking for??? Thanks
-
I have the 68-69 GT wheels on my car and the 215s seem to fit very nice
-
I have Firestone supreme P215/70R-14s, needs bigger tires for sure, the car is way too powerful for these puny rims/tires. Sorry, the cars look better with more substantial rubber, even my 65 with a 5.0 destroy puny 14s. Safety is more important than anything.
-
I have Firestone supreme P215/70R-14s, needs bigger tires for sure,...........
But the OP asked for "What radial tire best matches the F-70 WSW Polyglas tire that came on the 1970 14x7 steel wheels??" ;)
14" and even 15" are getting harder and harder to find In a couple of years the original style reproductions may be your only choice. The challenge gets compounded when you ask for WSW.
Allot of what is still available today is Chinese made tires - any plenty of those companies have had problems lately according to the newspaper reports .
Just went through a similar exercise and these sights might help
http://www.tirerack.com/tires/tiretech/45_conversionchart.html (http://www.tirerack.com/tires/tiretech/45_conversionchart.html)
http://www.discounttire.com/dtcs/infoTireMath.dos (http://www.discounttire.com/dtcs/infoTireMath.dos)
http://tire-size-conversion.com/tiresizes/ (http://tire-size-conversion.com/tiresizes/)