Author Topic: 1970 - Wheel Size (Read 1644 times)

Mach1ne · « **Reply #50 on:** December, 10, 2009, 04:59:30 PM »

Quote from: BobV on December, 08, 2009, 11:37:51 AM

...sort of. The rim diameter and backspace are just as important... The idea is to get MORE tire width than stock. With a larger diameter rim, you get to run extra backspacing and extra wheel & tire width, since everything tucks inside the wheelwell better. Yes, the overall diameter stays constant, but extra width is certainly possible with the right combination. It's all a juggling act...

Try fitting a 255 section 14" tire on an 8" wide wheel on the front and you'll see (it won't fit). Yet, with a 17x8 wheel (4.75 BS) and 255 tire, you'll have room to spare.

With that said, some people prefer the look of taller sidewalls, or run a smaller OD tire for a lower CG and less rolling inertia. All depends on what you want, budget, and how serious you are. :)

With ALL that said, you won't find a budget 17" solution... Just starting out, I'd get a cheap set of 15x7 4" BS wheels, some decent 235/245 /50/15 tires and get out there and work on improving the nut behind the steering wheel... :ecit

Okay back to the wheel discussion.

Bob, you think that I should go with 17x8x4.75?

Jeremy's 17x8x4.5s do not leave much clearence on the front.

DodgeStang's charts so that I should be fine with a 245/45/17 with a 17x8x4.0.

Do you think that a wheel shop in KC would have a wheel with tire to loan me to confirm what will work.

I was thinking about the wheel shop down from me on Johnson Drive.

My other option would be to see if Jeremy will loan me his two front wheels for a day.

Thoughts?

silverblueBP · « **Reply #51 on:** December, 10, 2009, 05:07:48 PM »

Another thought I just had, are you looking at one piece wheels? There's a ton of stress put on the wheels on a road course and a lot (including me) use one pc wheels (TTD's). You might want to check that out.

Mach1ne · « **Reply #52 on:** December, 10, 2009, 05:17:17 PM »

The problem is that steel wheels are two piece. I would have to go with a milled aluminum wheel to get a one piece. More money.

I guess you did not fly out again this morning with the temp being -19?

silverblueBP · « **Reply #53 on:** December, 10, 2009, 06:52:30 PM »

No, changed the flight to Jan.

BobV · « **Reply #54 on:** December, 11, 2009, 06:05:05 AM »

Quote from: Mach1ne on December, 10, 2009, 04:59:30 PM

Bob, you think that I should go with 17x8x4.75?

Jeremy's 17x8x4.5s do not leave much clearence on the front.

DodgeStang's charts so that I should be fine with a 245/45/17 with a 17x8x4.0.

Do you think that a wheel shop in KC would have a wheel with tire to loan me to confirm what will work.

I was thinking about the wheel shop down from me on Johnson Drive.

My other option would be to see if Jeremy will loan me his two front wheels for a day.

Thoughts?

4.75 BS is best, but hard to find, especially in a cheap steelie wheel. I THINK you'll be fine , but it's close enough that I'd find a way to BEG, BORROW, or STEAL Jeremy's wheels for an hour...
IIRC, he's running 245/40/17 on front???

These cars vary enough from car to car that what fits on one may be one size too big on another... :amaz

daveSanborn · « **Reply #55 on:** December, 14, 2009, 05:33:44 AM »

Quote

These cars vary enough from car to car that what fits on one may be one size too big on another...

This is a very good point. While Dodgestangs chart is helpful..... and input and advice from other members is always welcome.... I've found over the years that there are too many small variables to positively "guarantee" that any aftermarket wheel/tire size (other than stock) will fit w/o issue.

The best way to ascertain whether a certain size will fit or not is to borrow a set and try them.

johnpro · « **Reply #56 on:** December, 14, 2009, 10:21:31 PM »

Quote from: BobV on December, 07, 2009, 05:08:19 AM

15's with 4.5" backspace WILL rub the UCA in front, unless you modify the UCAs or run spacers.

Oh... and Johnpro is running 4.25" backspace with his Cragars. That 1/4" makes all the difference in fit... :craz

My bad. You are correct. I checked and I have the 4.25" backspace on 15x8 Crager S/S's