Rim and tire size help needed - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 
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post #1 of 6 (permalink) Old 06-03-2017, 08:37 AM Thread Starter
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Rim and tire size help needed

1965 Fairlane 500 sports coupe , stock front coil springs and stock rear leafs in back , running Rod and custom motorsport front and rear disc brakes

Looking for alittle help on rim & tire size. These are the rims I am looking at http://www.visionwheel.com/wheel/1134/525/


Chrome , for the front 15X7, what would be better the
-7 offset 3.7 back set
OR
+6 offset with 4.25 back set ??


For the back 15X8 with :
-19 offset 3.75 back set
OR
0 offset 4.5 back set


Thanks for any help .
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post #2 of 6 (permalink) Old 06-03-2017, 10:27 PM
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Re: Rim and tire size help needed

I couldn't get the link to work for me. The wheels I am currently running are 3.75" backspace American Racing Outlaw I. https://www.summitracing.com/parts/are-ar615765/ They were just fine with stock ride height and drum brakes. With disk brakes & lowered I rolled the fender a bit for better fit & they only rub when going up my driveway with a passenger in the front seat. I am on the ragged edge of fit with these. I am running 215/60R15 tires. With a 195/60 they would fit better. I would look at the 4.25" backspace more than the 3.75" since if you have issues with the 4.25" you can always run spacers. Remember when you swap to discs at least on the front it increases track width by 1/8" per side. At least with the brakes I used. I think a lot of guys run 4" back space.

Have you considered another brand? Personally I think I am going to update to 17's when I wear out the tires on it. There just isn't much in the way of options for 15" tires anymore with width or compound for street tires. 17"'s don't look too huge and have a much better selection. I like this personally for the front https://www.summitracing.com/parts/sdk-s1ms1007177/ and this in the rear https://www.summitracing.com/parts/sdk-s1ms10071785 with these tires https://www.tirerack.com/tires/tires...omCompare1=yes I think these will fit my car well with the measurements I took. They are also close to the same diameter with each other but a little shorter than what I am running now. With the lower amount of bulge from the shorter sidewall and the shorter overall height I will gain some fender clearance in the front. It also has a considerably wider footprint than what I am running now for better traction. To top it off it is a modern high performance tire that should perform much better than what I can choose from in 215/60R15's.
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post #3 of 6 (permalink) Old 06-05-2017, 04:59 AM Thread Starter
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Re: Rim and tire size help needed

Thanks Magnus, please post pictures when you get your new wheel set up, When I got the car it had Keystone rims 14" with E 78 Fastrax belted uniroys on front with Tager paw G 70 on rear, I like the look of the smaller rim and taller side wall on this old car, I will have to keep looking and see what I can find for 15" tires that would be the same size as the above 14" tires .


Thanks again for the info.
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post #4 of 6 (permalink) Old 06-05-2017, 08:58 AM
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Re: Rim and tire size help needed

Quote:
Originally Posted by gunnerthesnowm View Post
Thanks Magnus, please post pictures when you get your new wheel set up, When I got the car it had Keystone rims 14" with E 78 Fastrax belted uniroys on front with Tager paw G 70 on rear, I like the look of the smaller rim and taller side wall on this old car, I will have to keep looking and see what I can find for 15" tires that would be the same size as the above 14" tires .


Thanks again for the info.
It'll be a while. I ain't buying anything new until I wear these out.


The stock size for the Fairlane in 1965 was "7.35-14" That translates to a 195/75R14 or a 185/80R14. This is usually a diameter of 25.5" to 25.7" This is the same size as your E78's. A 15" comparision would be 195/70R15. This is really an odd size. Coker makes a white wall this size and Continental & General each sell a highway all season this size. You would have much more luck with a 205/65R15 which is just slightly wider and the same diameter as the 195/70R15. If you want the narrow width of the stock tire and can live with the shorter height a 195/65R15 has much more options but is .7" shorter.

The G70's would be a 205/70R14 which have a diameter of 25.3" on average. The closest to this for a 15" wheel is 205/65R15 in width which is slightly taller by .2" or the 215/60R15 which is shorter by .1" and wider by .4"

The size I am running on my car now 215/60R15 has a diameter of 25.2" I say "usually" or "on average" on diameters because there is variance in brands. If you are running a limited slip you will want to try to keep the diameter of your front & rear close for your spare. It's not so important for an open diff but it still is nice. It also helps with weight distribution as it doesn't load the shorter side (usually the front) as heavily. Have fun & I look forward to seeing how it works out for you.

Sources: Tire Size Helper & https://tiresize.com/converter/
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post #5 of 6 (permalink) Old 06-08-2017, 08:38 PM Thread Starter
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Re: Rim and tire size help needed

Thank you so must for the tire size info, I think I will order my rims and see what they look like on the car and get a better idea how much room I have with taking some measurement from rims to see how much room is there for tires.
Hoping that my order gets sent out from Mac,s early next week, Its over 5 weeks late, once its here I will have everything needed to get her back together ,Hoping for A Aug. drive .
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post #6 of 6 (permalink) Old 06-17-2017, 09:34 AM Thread Starter
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Re: Rim and tire size help needed

Ok , took the tires and rims that were on the car into my tire store that I take all my vehicles to , the owner has stock cars and races ovals , He measured up the tires and rims, we went with the wider tire on the front.
Magnus, you were right on for the fronts 205/65R15 , but the backs were 215/70R15, I order the new rims a went with 15X7 all around 4" backspacing 0 offset
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