15" or 17" wheel? - Page 2 - Vintage Mustang Forums

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post #16 of 50 (permalink) Old 07-01-2012, 10:40 AM
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235 50 17 is too tall. Fit would be better with 4.25bs in the front and 4.75 in the rear.

Nick
1965 Fastback 410c AOD - DT
1967 Fastback 347 T5- Cruiser
1968 Fastback 408w T5 - Brute
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post #17 of 50 (permalink) Old 07-01-2012, 02:42 PM
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Quote:
Originally Posted by Meadowlark Yellow View Post
Thanks for all the feedback on this question - it has been interesting reading.

Right now I'm leaning toward two options (both in anthracite):

AR Torque Thrust M 17 X 7 , 4" BS, 235/50 R17 all 4 corners

OR

AR Torque Thrust M, 17X8, 4.5" BS, 245/45 R17 all 4 corners

Based upon my research, these should be a slam dunk for fitment, although I've seen 17X7 4.25 & 17X8 4.75 suggested.

Andrew

Interesting...I started a thread last night on this. I'm going with the 17x7 Torq Thrust M. I want 4.5" BS though (I need to make sure they make these) and I think I'll use a 1/4" spacer. 235/45 front Bridgestone Potenza's. Can't make up my mind on the rear...maybe 235/55's (if not, I'll go with 235/45 on all 4 corners).
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post #18 of 50 (permalink) Old 07-02-2012, 01:33 PM
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you can check out my car... I rolled the lips in rear, cut the lip in front, but gives you an idea at least...
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post #19 of 50 (permalink) Old 07-02-2012, 01:34 PM
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I have room for more tire/rim both front and rear btw.
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post #20 of 50 (permalink) Old 07-23-2012, 09:15 PM
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Originally Posted by supershifter2 View Post
i have always prefered 15" tires with the taller sidewall for roadracing. however the only good tires in 15" are racing slicks. ......."
like most rules of thumb, there is an important exception to this statement: the Avon CR6zz

CR6ZZ | Avon Motorsport

it's DOT street legal, but essentially a soft compound race tire. You can have the best of both worlds with this tire, vintage looks and modern traction without the "rubber band" look of the 17" tires, which, in my opinion, look like hell on '60's cars.

I've seen cars with the Avons COMPLETELY embarrass cars with more HP, but that were running modern 17" rubber.

the downside is the cost, they will cost upward of $350 each and won't last too long.

Z.

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post #21 of 50 (permalink) Old 07-23-2012, 09:36 PM
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I have owned many different sets of wheels/tires on my 65-66 cars. I just recently sold a 65 fastback that had 17x 8 tq thrust 2's and until 6 months ago. I had the same wheel tire combo on my 65 coupe. Although it looked nice, the ride quality with "rubberband" sidewall height sucked.

I just switched to 15 x 7 styled steel wheels with michelin tires and the car rides so much better and does't look like every other mustang/camaro at the car shows anymore.

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post #22 of 50 (permalink) Old 07-26-2012, 07:11 AM Thread Starter
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17x7 4.75 bs

Thanks for all the opinions so far, I've got some more questions:

I've looked at a couple of cars with 17X8 4.5 BS, and I see that it does push the tire very far out toward the fender lip. I would prefer the wheel pulled in a little more (for clearance reasons), and according to my math, a 17X7 with a 4.75 BS would provide a full 1.25 additional clearance. Why don't more people run something like that? Is it mostly an appearance issue, where people want to run a closer gap to the fender?

Also, most of the non-custom BS wheels I am finding seem to be 17X7 4" and 17X8 4.5 (basically 0 offset for vintage cars, and maybe another version with 30+mm offset for newer cars). Does anyone know of and affordable five spoke style (decent quality) 17 X 7 4.25+ BS? As far as the 17X8 4.75, the MB old school is the only affordable option I am aware of, I may wind up going that route, although I think that would still be a little closer to the fender than I am comfortable with.

Also, to zray's point - I do agree that these cars tend to look better with the 15s and taller sidewall, but the tire selection is so poor these days (and probably will be worse in 5 years when I need another set), I feel like I would basically married to those Avon's if I went 15, and praying they didn't go extinct down the road.
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post #23 of 50 (permalink) Old 07-26-2012, 09:27 AM
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Probably that whole front suspension getting in the way issue coupled with wanting wider tires on the 8 inch rim.

Nick
1965 Fastback 410c AOD - DT
1967 Fastback 347 T5- Cruiser
1968 Fastback 408w T5 - Brute
1991 GT Hatch - Fauxbra
1996 Dodge Viper GTS

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post #24 of 50 (permalink) Old 07-26-2012, 07:11 PM
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I run the 16x8's all the way around on a 66 and love the look. Its tall enough to be vintage with a nuance of modernization without the downtown look showing up on every customized car.

The best part is there is a huge fleet of Porches and BMWs that give an extremely wide selection of tires at very affordable prices. All the vintage styles come in 16x8 and if they fit on a 66...

The handling advantages 17s over 16s have to be in the noise. If anyone wants to find out, lets roll ;o)...

Cheers,

M
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post #25 of 50 (permalink) Old 07-26-2012, 07:30 PM
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I personally prefer the 16's...and so does my driver Skitz...

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post #26 of 50 (permalink) Old 07-26-2012, 07:37 PM
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I had this same discussion with my son about 9 years ago when I was looking to upgrade from 14" to 15" or 16" and he was working for America's Tire Store. In essence he said that tire technology R&D money is going into the 17" and larger tires so if street performance tires are on your list, the options going forward will be fewer and fewer below 17". He was right.

On the rubbing issue, the sweet spot in backspacing for a 17" x 8" is 4.75" on these cars. Unfortunately, many wheels have less backspacing and the outer corner of the tire tread can rub the inner fender wells and wheel lips during bumps and cornering, especially if you carry passengers regularly. Custom backspacing may be in your future if you can't find a style with the necessary backspacing form the "off the rack" selections.

Lastly, despite identical tire sizes, tires from different manufacturers can be different. For example, in my experience, the B.F. Goodrich 245/45x17 KDWS is the same tread width as the Yokohama 235/45x17 S-Drive.

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post #27 of 50 (permalink) Old 07-26-2012, 08:14 PM
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Quote:
Originally Posted by dobrostang View Post
The handling advantages 17s over 16s have to be in the noise. If anyone wants to find out, lets roll ;o)...

Cheers,

M
There is a braking advantage


Nick
1965 Fastback 410c AOD - DT
1967 Fastback 347 T5- Cruiser
1968 Fastback 408w T5 - Brute
1991 GT Hatch - Fauxbra
1996 Dodge Viper GTS

https://www.youtube.com/watch?v=0LUK2D0GjdY
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post #28 of 50 (permalink) Old 07-26-2012, 08:53 PM
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If I was restoring my 66 now, I'd opt for 17's. There are a lot better track tire options.

-Mark-

1966 Mustang 2+2

"Money can't buy happiness, but it can buy a race car. And I've never been sad in a race car!"
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post #29 of 50 (permalink) Old 07-26-2012, 09:08 PM
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I went through this decision process just a few months ago. There are several "good" choices in the 15" realm if you stay in the 225s. If you want a wider tire for the back the only real choice is the CR6ZZ. I chose BFGs for the Sunday drive and will get a set of Avons next season if I make it to the track.
Although 17s will open lots of doors on both the tire and brake front, don't think there aren't some great options that fit 15s, they just tend to be expensive. S&T just put out a new aluminum caliper 12" disc that will fit under 15" wheels and will brake with the best of them.
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post #30 of 50 (permalink) Old 07-26-2012, 11:01 PM
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Originally Posted by Wsmatau View Post
".........S&T just put out a new aluminum caliper 12" disc that will fit under 15" wheels and will brake with the best of them.
the need for huge disc brakes on a relatively light car such as the '65/'66 Mustang is so overblown. Once you have a brake that can lock up the wheels at any desired speed you have ALL the brake needed. The key to great brakes is not size, it's having the right friction material. With ebc redstuff pads in front & porterfield RS-4 shoes in back I had no problem locking up the brakes at way beyond legal speeds (100 mph +) on my former '66 GT350 with stock brakes (no power assist). Granted, the Shelby has wider shoes than a stock Mustang, but you get the idea.

Z.

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