PY Online Forums - Bringing the Pontiac Hobby Together

PY Online Forums - Bringing the Pontiac Hobby Together (https://forums.maxperformanceinc.com/forums/index.php)
-   70-73 Firebird & TA TECH (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=437)
-   -   Who has run 255/60/15 tires all the way around on a 70-73 TA? (https://forums.maxperformanceinc.com/forums/showthread.php?t=854959)

yellow fever 11-30-2021 09:23 PM

Who has run 255/60/15 tires all the way around on a 70-73 TA?
 
Many guys with late 70s TA's and the 15x8 WS6 wheels say you can run the 255/60/15 tire on the front with no rubbing of the inner fender wells.

This tire is slightly shorter and wider than the original 225/70/15 on those cars.

But what about the early 70's TA's? I would like to run this size all around on my 70 TA, which is lowered 1" in the front, on a 15x8 wheel.

The 235/60/15 is approximately the same size as the original F60-15 on our cars.

Are our fender wells the same size as the late 70s cars? Thanks!

Aus78Formula 11-30-2021 09:43 PM

Rub on sway bar at full lock perhaps, adjust accordingly if an issue.

455dan 11-30-2021 10:41 PM

Running a set of 265/50/15 Radial T/As (old) on my 73's front end on 8 inch wide 15's.

Bummer Goodrich dropped the 50 series 265 and no 255's either


Zero offset wheels.

I have a set of the 15 X 8 snowflakes without tires- can't do it right now but will try and update when i get some new tires mounted up on them in the future.

78w72 12-01-2021 10:33 AM

Quote:

Originally Posted by yellow fever (Post 6299013)
Many guys with late 70s TA's and the 15x8 WS6 wheels say you can run the 255/60/15 tire on the front with no rubbing of the inner fender wells.

This tire is slightly shorter and wider than the original 225/70/15 on those cars.

But what about the early 70's TA's? I would like to run this size all around on my 70 TA, which is lowered 1" in the front, on a 15x8 wheel.

The 235/60/15 is approximately the same size as the original F60-15 on our cars.

Are our fender wells the same size as the late 70s cars? Thanks!

fender wells, fenders & suspension are basically the same on early cars... i have used 255/60 on the front & rear of my 72 firebird that is lowered 1.5" in front & about the same in the rear with no rubbing issues using 15x7 rally2 wheels.

for a short time when the car was first being driven after a engine & driveline restore i had 15x8 snowflakes with 255/60 front & 275/60 rear... no issues at all for normal driving, it may be possible that at full lock of the wheel & backing up on an angle there could be a slight rub in the front but that is very rare & usually on cars with sagging front springs lower than a good stiff lowering spring.... but ive never had that happen. you should be fine 99% of the time with 255/60s all around.

72projectbird 12-01-2021 12:29 PM

I haven't run that size on the early cars, but I've had several 77-81 T/As with 255/60s on all 4 corners and they fit great and look awesome.

eaglesan13 12-01-2021 12:58 PM

2 Attachment(s)
My old 1971 Trans Am with factory springs. The honeycomb wheels had 255-60-15 tires and the tires did not rub. The rally II wheels (KR code) had F-60-15 tires.

71GP76TA 12-01-2021 01:37 PM

245's look and fit better IMWO.

SD73 12-01-2021 02:53 PM

I run 255/60/15s on all 4 corners of my '73. On rare lock-to-lock occasions I'll get a slight rub. They're on the factory rally 15x7s.

eaglesan13 12-01-2021 04:17 PM

1 Attachment(s)
I agree, I'm running 245's on my Formula. .

Quote:

Originally Posted by 71GP76TA (Post 6299166)
245's look and fit better IMWO.


Baron Von Zeppelin 12-01-2021 04:19 PM

Quote:

Originally Posted by SD73 (Post 6299188)
I run 255/60/15s on all 4 corners of my '73. On rare lock-to-lock occasions I'll get a slight rub. They're on the factory rally 15x7s.

I had them on my 73 with 15x7 R2's for a while with same results.
(A/C car)

and then also 275/60/15 on 15x7 mid-80's TA alloys , on my 79 for a while (set of 4) with same results.
(A/C car)

78w72 12-01-2021 04:58 PM

Quote:

Originally Posted by Baron Von Zeppelin (Post 6299223)
I had them on my 73 with 15x7 R2's for a while with same results.
(A/C car)

and then also 275/60/15 on 15x7 mid-80's TA alloys , on my 79 for a while (set of 4) with same results.
(A/C car)

275/60 up front? thats a awfully big tire for the front & will rub a lot easier on most stock height or lowered cars. got any pics of the car with 275's?

Baron Von Zeppelin 12-01-2021 08:01 PM

I don't have any pictures of the 79 with the later model wheels on it & the 275's.
Just some older pics when it still had the 15x8 Snows on it.
4spd 4WDisc Loaded
My youngest brother bought it from me and still has it.
Can check sometime with him for pics of it with the 275's.
They were on it when i sold him the car.
I thought they looked good on that car too.
Bought those tires (Goodyear Eagle ST) "as like new" on the cheap via local trading post - they were on a pick up truck a guy had just bought and he wanted dual purpose tires on the truck.

The 73 was my SD.
It had 255/60 Gyear Eagle GT when i got it - when it needed new tires i bought new Eagle ST 245/60 . And almost didn't like the 245 look versus the old 255's.
Took a couple weeks to get over that hump.

This was all back when i drove those cars on a regular basis in 80's early 90's. :)

71GP76TA 12-01-2021 11:19 PM

Quote:

Originally Posted by eaglesan13 (Post 6299222)
I agree, I'm running 245's on my Formula. .

That Formula made me drool all over my keyboard..

1965gp 12-01-2021 11:37 PM

1 Attachment(s)
If it helps this is my 79 (with 77 fascia) and 275/40 17’s all the way around

Aus78Formula 12-02-2021 12:02 AM

One reason I prefer staggered with the wider front track and wheelarches. Still looks great obviously!

78w72 12-02-2021 10:25 AM

Quote:

Originally Posted by 1965gp (Post 6299349)
If it helps this is my 79 (with 77 fascia) and 275/40 17’s all the way around

275/40s are only 25.7" tall.. 255/60 are 27" tall.

71GP76TA 12-02-2021 01:13 PM

Years ago I had 255's on a '79 10th anniv... no rubbing..

napster 12-02-2021 01:29 PM

I run 255/60's all around my '73 on 15 x 7. No rubbing.

I had run 255/60s on my'70 and had some rubbing issues on the front. Went to 245/60 on the front and the problem was solved.

Formulabruce 12-02-2021 02:13 PM

Quote:

Originally Posted by 72projectbird (Post 6299140)
I haven't run that size on the early cars, but I've had several 77-81 T/As with 255/60s on all 4 corners and they fit great and look awesome.

On what wheels?

72projectbird 12-02-2021 03:18 PM

Quote:

Originally Posted by Formulabruce (Post 6299507)
On what wheels?


Had a set on 7" Rally 2s, and a few sets on 8" flakes and turbo wheels.


All times are GMT -4. The time now is 01:40 AM.