1967 Fastback: 215s or 225s up front?
09-03-2014, 04:16 PM
#12
09-03-2014, 06:33 PM
#13
4th Gear Member
Join Date: Nov 2013
Location: arizona
Posts: 1,398
remove spring.
compress tire until it hits the fender.
lower tire around 1/2".
measure distance from rubber bumper to top of suspension arm where the rubber bumper hits/bottoms.
add around 1/2" to this number because the rubber stop will compress that much.
make a 1 1/2" diameter spacer that thick and bolt it to the top of the arm where the rubber hits. you will probable see a mark on the arm where this occurs.
now, your tires that you currently have will never ever hit.
if it bottoms out too much, you simply start increasing spring and damping rates until it only bottoms under extreme conditions.
.
Last edited by barnett468; 09-03-2014 at 07:43 PM.
09-03-2014, 06:38 PM
#14
4th Gear Member
Join Date: Nov 2013
Location: arizona
Posts: 1,398
i don't quite understand your question. so i can't properly answer it if you read my posts again the answer you are looking for might be there.
i would think that the fact that two peoples tires on 8" rims on this thread hit the body should easily explain that 8" rims were not designed to fit on this model. its noit a belief, its a simple fact. i have also removed countless numbers of 8" rim and tire combos because they hit the body somewhere.
you mentioned you had 225 and they did not hoit but that is incomplete info so it doesn't help him much.
what diameter where your rims?
what offset where they?
what year were they on?
what were the other dimensions of your tire?
did you do the clearance test i posted?
if you did not do the clearance test i posted, you can not say that they would never hit under any circumstance. you can only say that with your particular set up and roads and driving style they did not hit.
only the clearance test or something similar can give definitive answers/proof, its that simple. do it and be positive or don't do it and guess.
.
i would think that the fact that two peoples tires on 8" rims on this thread hit the body should easily explain that 8" rims were not designed to fit on this model. its noit a belief, its a simple fact. i have also removed countless numbers of 8" rim and tire combos because they hit the body somewhere.
you mentioned you had 225 and they did not hoit but that is incomplete info so it doesn't help him much.
what diameter where your rims?
what offset where they?
what year were they on?
what were the other dimensions of your tire?
did you do the clearance test i posted?
if you did not do the clearance test i posted, you can not say that they would never hit under any circumstance. you can only say that with your particular set up and roads and driving style they did not hit.
only the clearance test or something similar can give definitive answers/proof, its that simple. do it and be positive or don't do it and guess.
.
Last edited by barnett468; 09-03-2014 at 06:48 PM.
09-03-2014, 06:54 PM
#15
2nd Gear Member
Thread Starter
Join Date: Feb 2006
Location: PA
Posts: 225
I have 215/45/17's on a 7" wheel with cut coils. It NEVER rubs anything. If I did it again, I would probably put a 225. The front of my car is lower then most so the 215 is a good fit as far as appearance (barely tucks the top of the tire). Im in the process going bigger and wider for SEMA.
Very nice!! Thanks Iskwezm!
09-03-2014, 06:56 PM
#16
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Join Date: Feb 2006
Location: PA
Posts: 225
09-03-2014, 07:01 PM
#17
2nd Gear Member
Thread Starter
Join Date: Feb 2006
Location: PA
Posts: 225
at the widest point, the tires should not be more than around 1 1/2" wider than the rim
ok, heres how you do this properly.
remove spring.
compress tire until it hits the fender.
lower tire around 1/2".
measure distance from rubber bumper to top of suspension arm where the rubber bumper hits/bottoms.
add around 1.2" to this number.
make a 1 1/2" diameter spacer that thick and bolt it to the top of the arm where the rubber hits. you will probable see a mark on the arm where this occurs.
now, your tires that you currently have will never ever hit.
if it bottoms out too much, you simply start increasing spring and damping rates until it only bottoms under extreme conditions.
.
ok, heres how you do this properly.
remove spring.
compress tire until it hits the fender.
lower tire around 1/2".
measure distance from rubber bumper to top of suspension arm where the rubber bumper hits/bottoms.
add around 1.2" to this number.
make a 1 1/2" diameter spacer that thick and bolt it to the top of the arm where the rubber hits. you will probable see a mark on the arm where this occurs.
now, your tires that you currently have will never ever hit.
if it bottoms out too much, you simply start increasing spring and damping rates until it only bottoms under extreme conditions.
.
09-03-2014, 08:27 PM
#18
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
Mine only rub in extreme circumstance, and only because I'm lacking an additional ~1/2" of backspacing.
8" wide wheels can fit on 67+, but everything has to be just right to avoid rubbing. And that's hard to do when you start throwing in brake changes.
8" wide wheels can fit on 67+, but everything has to be just right to avoid rubbing. And that's hard to do when you start throwing in brake changes.
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