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ALB posted:

... I just checked the website and the backspacing is the same for the 4 1/2's and 5 1/2's (the extra width was added to the frontside of the wheel). I don't get it- why wouldn't the width be added to the inside? 

They matched Mangle backspacing. Lots of guys want the deeper rim reveal. It'd be rough to offer custom backspacing at this pricepoint. Honestly, I don't know how they can do it with what they offer now. 

Terry Nuckels posted:

185s are a lot of tire for a narrow rim. You can do it - I used to have 4-1/2" rims with 185 tires - but performance suffers. We run low air pressure and there is a lot of sidewall movement through corners with that combination. However, it's a cushy Cadillac ride if you're more inclined to snail by and look at the scenery...

That makes a lot of sense Terry, Ill have to check when airing down. Thanks for the heads up on that.

MusbJim posted:

For visual reference, I have the fake Fuchs (5x130) at 15 x 5.5 with 3 .75" backspace. For the outlaw look I wanted wider lower profile tires, so I use 185x60 tires. 18psi in front, 22psi in rear. Click pic to enlarge. 

CJI_7015

That's a great look which is why I wanted 185's on my wheels too, but apparently not  a good thing to do on 4.5" wheels.

Stan Galat, '05 IM, 2276, Nowhere, USA posted:

I also had the 185/4-1/2" combination that JPS touts as a solution for an IRS rear-end on a classic (non-flared) body. I agree with Terry's analysis. 

The idea that putting down more rubber cures all ills is a fallacy. My 2002 JPS had not enough room for a credit card to be slid between the LR sidewall and inner fender. Couple a flexible sidewall with clearances that tight, and it's just a bad idea.

Terry corrected the problem by switching wheels to something with more width and back-spacing than the steel wheels. Just putting a smaller tire on it to start with is the right way to handle the issue of what to do with 4-1/2" rims.

Sound advise and I appreciate your feedback Stan. 

Dutch posted:
ALB posted:

@Dutch said- "That's a great look which is why I wanted 185's on my wheels too, but apparently not  a good thing to do on 4.5" wheels."

You live in California, correct? There will be a shop (probably fairly close) that can widen your rear wheels; 1" to the inside will clear the shock mount and spring plate.

That may be worth looking into, thanks.

It's not cheap to do, but if it allows you to run a wider tire on the back (and the car will handle better) it's worth it. I just had a pair of  6" Fuchs widened 1" (to the inside) and am pretty confident 205/60's will now fit under the rear fenders (and thinking 215/60 may even squeeze under there).

ALB posted:
Dutch posted:
ALB posted:

@Dutch said- "That's a great look which is why I wanted 185's on my wheels too, but apparently not  a good thing to do on 4.5" wheels."

You live in California, correct? There will be a shop (probably fairly close) that can widen your rear wheels; 1" to the inside will clear the shock mount and spring plate.

That may be worth looking into, thanks.

It's not cheap to do, but if it allows you to run a wider tire on the back (and the car will handle better) it's worth it. I just had a pair of  6" Fuchs widened 1" (to the inside) and am pretty confident 205/60's will now fit under the rear fenders (and thinking 215/60 may even squeeze under there).

I may look into doing that down the road a piece. 205/60's would look sharp on the rear wheels!

So in speaking with Greg, a new development has come up regarding my gimpy right rear wheel camber...Initially he thought it was a bent (IRS) swing arm, but after putting a new one on there was no change. Now it looks to be a bent frame so he is doing some rework on that. He's really putting some time into getting that wheel at the right camber. It was wearing the left inside tread off the tire at a horrendous rate.

Dutch posted:

So in speaking with Greg, a new development has come up regarding my gimpy right rear wheel camber...Initially he thought it was a bent (IRS) swing arm, but after putting a new one on there was no change. Now it looks to be a bent frame so he is doing some rework on that. He's really putting some time into getting that wheel at the right camber. It was wearing the left inside tread off the tire at a horrendous rate.

Did you pick up your Speedster yet? I'm going to try stopping by this afternoon and pick up Eleanor... hopefully they get everything to done for me...

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