15x8s with 245 60r 15 all around on 69 mustang?

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69stang_250
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15x8s with 245 60r 15 all around on 69 mustang?

Post #1 by 69stang_250 » Sun Jan 28, 2018 11:15 am

Hey guys.
Do any of you guys know if 15x8s with 245 60 15 tires would fit on all 4 corners of a 69 mustang? Or is that too big?
I am going to the old trans am minilite wheels and want a little more rubber on them than the 225 tires I am running right now.
I read an artical where they upgraded the brakes on a 70 boss 302 and it says they put 245 60 15s on all 4 corners, but I am curious if any of you guys have experience with that big a wheel on the 69 and above mustangs.

Also, I know this hasp probably been beaten to death, but is there any major improvement in the handling or acceleration when going to 17” wheels? I have read a bunch of mixed opinions and just want to see what you guys think.

Thanks
69 mustang coupe, 250 .030 over, forged pistons, port & polished CI AL head 54cc's 10.25CR, 280/280 Clay smith cam 1 degree advanced, 1.6 adjustable rockers,
Re curved DSII, MSD AL6, CI Intake, FITech 400HP fuel injection. T5 trans, 8" rearend w/3.80 gears, Eaton trutrack.

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rocklord
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Re: 15x8s with 245 60r 15 all around on 69 mustang?

Post #2 by rocklord » Mon Jan 29, 2018 9:35 am

Here's a tire fitment chart I found for the 69-70 Mustang.


Hope this helps.
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69stang_250
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Re: 15x8s with 245 60r 15 all around on 69 mustang?

Post #3 by 69stang_250 » Tue Jan 30, 2018 2:00 am

Thank you! This is the kind of chart I have been looking for!

:thumbup:
69 mustang coupe, 250 .030 over, forged pistons, port & polished CI AL head 54cc's 10.25CR, 280/280 Clay smith cam 1 degree advanced, 1.6 adjustable rockers,
Re curved DSII, MSD AL6, CI Intake, FITech 400HP fuel injection. T5 trans, 8" rearend w/3.80 gears, Eaton trutrack.

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bubba22349
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Re: 15x8s with 245 60r 15 all around on 69 mustang?

Post #4 by bubba22349 » Tue Jan 30, 2018 10:54 pm

69stang_250 wrote:Hey guys.
Do any of you guys know if 15x8s with 245 60 15 tires would fit on all 4 corners of a 69 mustang? Or is that too big?
I am going to the old trans am minilite wheels and want a little more rubber on them than the 225 tires I am running right now.
I read an artical where they upgraded the brakes on a 70 boss 302 and it says they put 245 60 15s on all 4 corners, but I am curious if any of you guys have experience with that big a wheel on the 69 and above mustangs.

Also, I know this hasp probably been beaten to death, but is there any major improvement in the handling or acceleration when going to 17” wheels? I have read a bunch of mixed opinions and just want to see what you guys think.

Thanks


As far as running the bigger diameter 17 inch wheels there can be advantages of less tire side wall movement in higher speed cornering. In the end for a High Performance or Racing car it's mostly about getting your unsprung weight as low as possible, so getting the total wheel tire package as light as possible is very good. Then balance this to the cost of the different wheel tires that are available. Good luck :thumbup: :nod:
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Re: 15x8s with 245 60r 15 all around on 69 mustang?

Post #5 by 69stang_250 » Thu Apr 05, 2018 2:45 pm

So I’ve got my Trans am wheels and cobra tires on. Went with 15x8 4.5 BS and 235 60r15 and they are working out great! No fitment issues and 1 wheel with tire is significantly lighter that the ansen sprint wheel.
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69 mustang coupe, 250 .030 over, forged pistons, port & polished CI AL head 54cc's 10.25CR, 280/280 Clay smith cam 1 degree advanced, 1.6 adjustable rockers,
Re curved DSII, MSD AL6, CI Intake, FITech 400HP fuel injection. T5 trans, 8" rearend w/3.80 gears, Eaton trutrack.

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Re: 15x8s with 245 60r 15 all around on 69 mustang?

Post #6 by B RON CO » Sat Apr 07, 2018 8:11 am

Hi, another advantage of larger rim sizes is the ability to use a larger brake rotor and caliper.
The acceleration factor is dependent on the tires total diameter, not the rim.
A low profile tire, with a stiff sidewall will stiffen the feel of the suspension, because the rebound of the sidewall factors into the total spring rate of the suspension. Good luck
B RON CO. Still workin' on it!

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