Brainstorm needed from wide wheel experts

[kcpaz]

Okay, so on my Boxster, I'm going to be running 17x10" and 17x12" CCW Classics (yes it's flared) and I'm trying to double check my logic in regard to the offsets needed. The car will have aftermarket coil-overs, and I would rather error on the side of slightly too much offset and "fine-tune" the fit away from the shocks with spacers. I have talked to John at CCW and his estimation was +32mm in the front, and +19mm in the rear. After crunching some numbers, I think these figures are pretty darn close but I wanted to check with the "masses" just to get a third opinion before I order.

[Johnny Danger]

Not enough information to make a calculation . What are the offsets on these wheels ?
When you say flared, what exactly are you referring to ? I hope more than just rolling the fender lip . It seems strange that anyone would manufacture a 17 inch wheel as wide as 10 and 12 inches .

[kcpaz]

Did you even read my post? I don't have wheels, I'm having wheels made. The offsets will be whatever I want. I'm using 17" wheels because I don't need a larger wheel for brake clearance and I want as little weight as possible. This is a race car, not a street car. The body is literally flared meaning custom fiberglass panels.

[kcpaz]

This is the car in question. 986forum.com/forums/showthread.php?t=25697&highlight=subaru+conversion

[Johnny Danger]

Originally Posted by kcpaz

Did you even read my post? I don't have wheels, I'm having wheels made. The offsets will be whatever I want. I'm using 17" wheels because I don't need a larger wheel for brake clearance and I want as little weight as possible. This is a race car, not a street car. The body is literally flared meaning custom fiberglass panels.

You state in your post that you will be "running 17x10" and 17x12" CCW Classics", nowhere do you mention that they're being made to order with selectable offsets . Therefore, the presumption is that these wheels have already been produced. With that said, I can't imagine being able to clear the perch on a set of aftermarket of coilovers with anything greater than a + 10 or 11 et on a rear wheel that wide, and +31 or so up front .

[kcpaz]

I guess I just assumed that it was common knowledge to "wheel guys" that CCW makes custom wheels and that the Classics are especially "made to order". Also, my post was not really a "will these fit" post as much as a "what will fit" post.

Anyway, you may be right about the spring clearance, but its a lot easier to add 10mm of spacer than have the wheels remade to go the other direction.

[Johnny Danger]

To put things into perspective, I run the following "aggressive" setup on my boxster .

Fronts : 19x8 +31 et with 235/35/19
Rears: 19x10 +31 with 275/30/19

* there's roughly 10 mm's or so of clearance from the adjustable perch all around.