SLO C5

I'm looking at buying a set of CCW 505As in 19x10 and 19x13. The rears have a 345/30 on them, 9.875" of backspacing, 73mm offset. I'm going to have some tubwork done, but am still concerned that the top of the tire will be out past the fender.

Would adding 1 or 2 degrees of negative camber to the rears move the top sidewall into the fender say, 1/4"?

davidfarmer

probably not, since you add camber by moving the bottom out, not the top in. Of course, since the upper pivot is not as high as the top of the tire, the top will tip in a little, but not much.
Of course, if you only need 1/4", it might do it.

AU N EGL

Quite possible. But a few other questions.

WHy are you getting 19" wheels?

18" wheels are more user friendly and are several pounds lighter. Plus rubber is much less expensive.

What are you going to use your car for?

auto-X ? track days ?, racing? or combination?

once you know what your going to use your car for, will help with the alignment.

SLO C5

90% street. It will see a few Auto-x events a year, like 3-5 tops. I'll probably put some race tires on the stockers.

I wouldn't be auto-xing on the 19" CCWs anyway, way too expensive for rubber.

I brought the question in here because you guys know about alignment.

I just don't want to spend $4000 on a set of CCWs and have them sticking out and looking ghetto.

glass slipper

If your tire/wheel pivoted at the bottom, it would take ~.95" movement at the top of the tire to reach 2 degrees negative camber assuming the tire started at 0 camber. Since the tire/wheel pivots at the upper control arm attachment point (as stated above), measure from the ground up to the attachment point out at the wheel (not at the frame) and divide by the OD of the tire...~27.15". (You need to jack up the car to unload the tire until it's barely touching the ground for a more accurate calculation, but you're just looking for a rough idea so don't worry about it.) If you multiply .95" by that number, you'll have the amount the bottom of the tire travels out with 2 degrees of negative camber. Subtract it from .95" to get the amount the tire travels in at the top. For example (using a made up number), let's say you measure 20.4" to the pivot point. That gives 20.4"/27.15"= .75 Then .75"*.95"=.71" out at the bottom so .95"-.71"=.24" in at the top. Hope this helps.

BQuicksilver

2 degrees camber on the rear for 90% street would eat up those pricey 345's very fast.