The Ford Barn

Jwawhite · 03-28-2023, 11:21 PM

My original tire size is 7.10 15-4 according to Shop Manual.

This translates over to: P215/75 R15.

The spare tire compartment is in the rear of the wagon covered by a lift up door.

The issue is the width of the tire near the top of the sidewall, it's too wide and the tire needs to be deflated to fit. Ok and not ok.

The old tires didn't they have straight sidewalls w/o the bulge of modern tires?

Is there a work around other than buying an expensive Cooker or? It's just the spare but I'd like it to fit better.

oldbugger · 03-29-2023, 09:37 AM

Would 205 fit

KULTULZ · 03-29-2023, 09:40 AM

HEY JW!

You are going to put new tires all-around including the spare?

Do you have one good bias-ply to use as the spare?

5851a · 03-29-2023, 10:21 AM

Get a space saver from 80's model Town Car/Grand Marquis/Crown vic. Check it's fitment on both front and rear but should be good.

miker98038 · 03-29-2023, 02:26 PM

I’ve got a compact spare out of a 90’s Aerostar. 16” rim, small tire, fit my bird and matched my rolling radius. Much smaller than stock except for diameter.

Daves55Sedan · 03-29-2023, 03:29 PM

Sponsored Links (Register now to hide all advertisements)

The original 675's and 710's had a 4" tread width. On my '55 Courier, I am using 710's with an older 710 spare in the spare tire well. On my '55 Fairlane sedan, I am using P205-75R15's on the front and P215-75R15's on the rear, but an old Coker 710 wide-white in the spare tire well. The P200 series tires are near twice the tread width as the OEM tires and wont fit in the spare tire spaces.
Yes, the OEM tires do have a bulge at the midsection of the tire profile, which probably makes the overall width a little less than 6 inches.
P205-75R15 = 27.1"dia x 8.1"W
P215-75R15 = 27.7"dia x 8.5"W
Oh, BTW, the reason I didn't use P215's all the way around is because it looked to me like the tire width would rub against the top ball-joint on the backside of the tire. So I went with 205's on the front.

Jwawhite · 03-30-2023, 06:11 PM

That's the answer that I thought was coming Dave, thanks...so the metrics really aren't the same in tread width.
I just need a tire that will fit the spare tire compartment w/o deflating it to fit!!

03-29-2023, 09:37 AM	#2
oldbugger Senior Member Join Date: May 2010 Location: Holland Mi Posts: 642	Re: Old size Tires (50's) vs Metrics of Today Would 205 fit

03-29-2023, 09:40 AM	#3
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,479	Re: Old size Tires (50's) vs Metrics of Today HEY JW! You are going to put new tires all-around including the spare? Do you have one good bias-ply to use as the spare? __________________ *** - MULTI-VEHICLE SYNTHETIC TRANSMISSION FLUID - Multi-vehicle transmission fluids are becoming more and more popular in the marketplace. Oil marketers design these fluids for a wide range of automatic transmission types. While they are not licensed by any specific auto manufacturer ... ??? ... enough said ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)

03-29-2023, 10:21 AM	#4
5851a Senior Member Join Date: Oct 2014 Location: NE Iowa Posts: 1,664	Re: Old size Tires (50's) vs Metrics of Today Get a space saver from 80's model Town Car/Grand Marquis/Crown vic. Check it's fitment on both front and rear but should be good.

03-29-2023, 02:26 PM	#5
miker98038 Senior Member Join Date: Mar 2013 Location: Kent, WA. Tucson, AZ Posts: 1,398	Re: Old size Tires (50's) vs Metrics of Today I’ve got a compact spare out of a 90’s Aerostar. 16” rim, small tire, fit my bird and matched my rolling radius. Much smaller than stock except for diameter.

03-29-2023, 03:29 PM	#6
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: Old size Tires (50's) vs Metrics of Today Sponsored Links (Register now to hide all advertisements) The original 675's and 710's had a 4" tread width. On my '55 Courier, I am using 710's with an older 710 spare in the spare tire well. On my '55 Fairlane sedan, I am using P205-75R15's on the front and P215-75R15's on the rear, but an old Coker 710 wide-white in the spare tire well. The P200 series tires are near twice the tread width as the OEM tires and wont fit in the spare tire spaces. Yes, the OEM tires do have a bulge at the midsection of the tire profile, which probably makes the overall width a little less than 6 inches. P205-75R15 = 27.1"dia x 8.1"W P215-75R15 = 27.7"dia x 8.5"W Oh, BTW, the reason I didn't use P215's all the way around is because it looked to me like the tire width would rub against the top ball-joint on the backside of the tire. So I went with 205's on the front.

03-30-2023, 06:11 PM	#7
Jwawhite Senior Member Join Date: Nov 2016 Location: Now on the Land of Sun City West, AZ Posts: 405	Re: Old size Tires (50's) vs Metrics of Today That's the answer that I thought was coming Dave, thanks...so the metrics really aren't the same in tread width. I just need a tire that will fit the spare tire compartment w/o deflating it to fit!!