SAAC Forum

The Cars => 1966 Shelby GT350/GT350H => Topic started by: SHELB66 on May 23, 2023, 06:11:34 PM

Title: Tire Size Recommendation 66 Hertz
Post by: SHELB66 on May 23, 2023, 06:11:34 PM
I'm looking for a tire size recommendation for my '66 Hertz.  I'll be utilizing the correct 14" magnum wheels (3.375" backspacing) and the A-arms have been lowered 2".  What's currently on there now are factory Ford chrome magnums with P195/70R14 tires.  The overall width of the rims is 8" so I'm thinking these are probably 6" rims.  The backspacing is 4-1/4".  How much tire can I comfortably use without issue considering the wheel will be outwards almost an inch.  Thanks very much!

Craig R.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 427hunter on May 24, 2023, 01:06:49 PM
I put repop firestone D70-14 on my gt350 (factory 10 spoke car) the blue streak 14/695 looks way to skinny. The D70's fit the wheel opening perfect.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: Bob Gaines on May 24, 2023, 01:54:43 PM
Quote from: 427hunter on May 24, 2023, 01:06:49 PM
I put repop firestone D70-14 on my gt350 (factory 10 spoke car) the blue dot 14/695 looks way to skinny. The D70's fit the wheel opening perfect.
I think you meant blue streak.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 427hunter on May 24, 2023, 02:03:51 PM
Quote from: Bob Gaines on May 24, 2023, 01:54:43 PM
Quote from: 427hunter on May 24, 2023, 01:06:49 PM
I put repop firestone D70-14 on my gt350 (factory 10 spoke car) the blue dot 14/695 looks way to skinny. The D70's fit the wheel opening perfect.
I think you meant blue streak.

I was trying to cut and paste the tire listing to show the size - it's listed as blue dot / blue streak - it would not cut and paste, I fixed it.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: Don Johnston on May 24, 2023, 03:09:10 PM
What is the radial tire size for the D70x14? 8)
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 427hunter on May 24, 2023, 05:24:34 PM
Quote from: Don Johnston on May 24, 2023, 03:09:10 PM
What is the radial tire size for the D70x14? 8)

There is no metric conversion that is exact but here are the specs:

Width 6.21
Cross section 7.85
Outer diameter 25.32

I hate radials on restored classic cars. The bias ply tires today are soft rubber and stay black vs the recycled radial rubber that turns brown.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 427hunter on May 24, 2023, 05:40:45 PM
Here is a photo of how it looks.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: Brant on May 25, 2023, 09:28:25 PM
Assuming that you want to use a radial tire, you will probably want to use a 205/70 x 14.

I have been running that size on a '66 driver which I have driven over 10K in the past several years.

Honestly, I am considering going with a 215/70, but with the lowered front end on your car, you may experience some front fender interference with this size. It is about 1/2" taller than the 205/70.

Here is a picture, although keep in mind that my trunk is heavily loaded here, so the car is a bit lower in the rear in this particular image.

(https://lh3.googleusercontent.com/pw/AJFCJaWxvLXHYfmg9G5R78ddxp4nnFwdRNN63LMp08_L3CXoo5Arok4zTE5FGl37fPAQaqnRbrKerNi8diNYO7iryIVIBn52Rgg7-p-KiAbZaKDLhiu78v9Iqj7btRH9T2GnWfolscBda3kFGbLXu2xODTte-w=w800)


Title: Re: Tire Size Recommendation 66 Hertz
Post by: SHELB66 on May 26, 2023, 12:03:58 AM
Thanks, Brant!  That's exactly the size I was considering.  I think it's a very good choice with much less chance of any interference.  Thanks for the picture of your car.  Lookin' GREAT!

Craig R.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 67 GT350 on May 26, 2023, 08:21:40 AM
I have thee 215 size on my 66 with no REAL issues, (very slight rub while backing up tight turn) Stock height, A arms have NOT been done yet even though they were to be done....(Go figure). And my wheels are the crap repro magnums....

I was thinking these, worried about the size though, but at least they have a nice lettering and are a radial.

https://www.cokertire.com/tires/goodyear-polyglas-radial-rwl-fr70-14.html
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 6s855 on May 26, 2023, 11:48:05 AM
I have these tires on my 66.  They're tall tires.  Probably will rub with a shelby drop.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 67 GT350 on May 26, 2023, 12:17:32 PM
YeahI thought so, just one size down and they would have a winner (SALES$$$$) BUT NOOOOOOOOOOOOOOOO!!!!
My car will need the drop as it looks like it has AWD.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on May 26, 2023, 06:44:14 PM
On mine are 205 60R 15 front and 215 60R 15 in rear.  No rubbing issues on front with the Shelby A arm drop included.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: 67 GT350 on May 26, 2023, 07:50:08 PM
Quote from: deathsled on May 26, 2023, 06:44:14 PM
On mine are 205 60R 15 front and 215 60R 15 in rear.  No rubbing issues on front with the Shelby A arm drop included.

How do you like the tires?

I have 14's on my 66
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on May 26, 2023, 09:14:07 PM
Quote from: 67 GT350 on May 26, 2023, 07:50:08 PM
Quote from: deathsled on May 26, 2023, 06:44:14 PM
On mine are 205 60R 15 front and 215 60R 15 in rear.  No rubbing issues on front with the Shelby A arm drop included.

How do you like the tires?

I have 14's on my 66
Eh, the tires are Kumho and are a tad old.  I got them on the fast and cheap just to get the car on the road again. I will need a new set quite soon. Not sure what would look best on 15 x 7 torques.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: greekz on May 28, 2023, 02:15:36 PM
I am running 225/60 14's on mine, with a 1" drop.  No rubbing in and out of my driveway or around corners.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: SHELB66 on May 28, 2023, 02:52:55 PM
Very nice!  I'm just not sure if the backspacing on a 10-spoke is the same as that for a Hertz Magnum 500 rim.

Craig R.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: greekz on May 28, 2023, 03:25:44 PM
Quote from: SHELB66 on May 28, 2023, 02:52:55 PM
Very nice!  I'm just not sure if the backspacing on a 10-spoke is the same as that for a Hertz Magnum 500 rim.

Craig R.

Thanks.

I do not know either, maybe someone here knows.

Greek
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on July 03, 2023, 02:07:35 PM
I found this pic on the internet and lifted it because I particularly warmed up to the deep dish on this magnum 500. Makes me almost want to put a set of Magnum 500s on the red Hertz. Almost...
Tire size looks like 205 70R 14 for this front wheel on a blue Hertz.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on July 03, 2023, 03:25:09 PM
Here is a blow up shot of the tire measurement. Tire appears to be Yokahama.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: SHELB66 on July 03, 2023, 04:35:06 PM
^^^  I've pretty much decided on that particular size tire.  Thanks for the images.  That's a huge help.

Craig R.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on July 03, 2023, 05:03:44 PM
Most welcome.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on July 03, 2023, 07:38:28 PM
To supplement the center caps for a Hertz are supposed to be red and gold with black lettering instead of black and gold. The experts can chime in and correct the record if I am misinformed.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on July 04, 2023, 04:54:05 PM
Center cap decal colors.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: GT350Lad on July 04, 2023, 05:19:51 PM
Quote from: deathsled on July 04, 2023, 04:54:05 PM
Center cap decal colors.

Yes that's Correct
Jesse from Shelby parts might have some
Title: Re: Tire Size Recommendation 66 Hertz
Post by: SHELB66 on October 28, 2023, 12:19:05 PM
Wound up getting BF Goodrich radial TA's (205-70's) all the way around, including spare.  All is good!  I entered the car in a show last weekend benefitting Alzheimer's disease. I entered a raffle of several bottles of Carroll Shelby wine in a nice wooden case.  All of my 42 tickets went into that drawing with the idea that I'd be taking that wine home with me.  No such luck!  Oh well.  It was a nice event with quite the variety of cars on display.

Craig R.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: deathsled on October 28, 2023, 01:59:35 PM
Quote from: SHELB66 on October 28, 2023, 12:19:05 PM
Wound up getting BF Goodrich radial TA's (205-70's) all the way around, including spare.  All is good!  I entered the car in a show last weekend benefitting Alzheimer's disease. I entered a raffle of several bottles of Carroll Shelby wine in a nice wooden case.  All of my 42 tickets went into that drawing with the idea that I'd be taking that wine home with me.  No such luck!  Oh well.  It was a nice event with quite the variety of cars on display.

Craig R.
Looking great!  Anyone try to rent your car for $17 per day and 0.17 cents per mile?
Title: Re: Tire Size Recommendation 66 Hertz
Post by: FL SAAC on October 28, 2023, 02:56:33 PM
This is the original size
Title: Re: Tire Size Recommendation 66 Hertz
Post by: FL SAAC on October 28, 2023, 02:59:01 PM
We have decided to go with 15 inch rims and are considering two options:

Same size on all four corners

Or

Staggered
Title: Re: Tire Size Recommendation 66 Hertz
Post by: FL SAAC on October 28, 2023, 03:05:31 PM
Quote from: Don Johnston on May 24, 2023, 03:09:10 PM
What is the radial tire size for the D70x14? 8)

Don this is probably the closest to the D70 14
Title: Re: Tire Size Recommendation 66 Hertz
Post by: SHELB66 on October 28, 2023, 06:56:04 PM
Quote from: FL SAAC on October 28, 2023, 02:56:33 PM
This is the original size

Actually the original tire size for a '66 Hertz was 6.95 x 14 which just happens to have the same diameter as my 205/70R14 tires (25.3").

Craig R.
Title: Re: Tire Size Recommendation 66 Hertz
Post by: FL SAAC on October 28, 2023, 07:36:09 PM
Quote from: SHELB66 on October 28, 2023, 06:56:04 PM
Quote from: FL SAAC on October 28, 2023, 02:56:33 PM


Actually the original tire size for a '66 Hertz was 6.95 x 14 which just happens to have the same diameter as my 205/70R14 tires (25.3").

Craig R.

Duly noted. Thank you
Title: Re: Tire Size Recommendation 66 Hertz
Post by: FL SAAC on October 30, 2023, 07:38:39 AM
Tire size is important,  but concentrate on the rims back space also for proper fitment