testpros

I'm planning to order 19x11 CCW 505 rear wheels and 305/30/19 tires. I'm trying to figure out the best offset to keep the setup from sticking out of the fenders (if possible) but not rubbing the suspension or wheel wells. What offset are you guys using? I'm thinking 62mm. Will that work? Also any pics of your setup would be great. FYI, I have a 1997 Coupe.

FYRARMS

The popular offset for those exact wheel/tire sizes in the Forgestar offerings is 55mm. Mine is below. The fitment is flush. I believe CCW uses a slightly less aggressive offset, so 62mm would be a good bet. Honestly, just let CCW pick the offset. They have done a gazillion C5s.

neutron82

https://ccwheel.com/contact/

0260N5

FYRARMS

^ What are those offsets, and are they sticking out? Because...

JETZ

Looking verrrry Sano indeed. Maybe it's 'the' BLUE.

You need to paint those wheels ALL black, and git ye some dem 'calibration covers'. Nowatimsayin? (Why do people do that?)

frank

testpros

So an offset on one wheel manufacture is not necessarily the same as for another? Let's say a by a Cray wheel with a 58mm offset and a CCW with a 58mm offset. Could the have different backspacing even though the offsets are the same?

Black 03 Z06

Will look up the specs on my CCW SP16a and post it later this morning. Rears have 2" lip with 305's that do not stick out and wheels will accept a big brake kit.

testpros

0260N5, do you know your rear wheel offset. Look like the stick out a good bit. Are those wheels 19x11 with 305 width tires?

Black 03 Z06

Specs for my CCW SP 16a wheels

Fronts - 19" x 9.5" with 7.30" backspacing and an offset of +52 with a 1" lip

Rears - 19: x 11" with 8.15" of backspacing and an offset of +64 with a 2" lip

Running Michelin PSS 265/30/19 fronts and 305/30/19 rears. They do not hang out.

Wheels were designed around a future big brake kit working with them.

Hope this helps. Good luck with your choice of wheels.

02BlownZ06

I have Cray Spiders 19 x 10.5 with a 65 mm offset and 305/30/19's on the back. They don't stick out at all.

FYRARMS

Thanks, brother! Definitely the blue!

FYRARMS

Wheels are offered in every offset imaginable, depending on the vehicle they are designed for, the actual wheel design, brake clearance, etc. Just like car manufacturers offer different colors than each other, wheel companies use different offsets.
Assuming they are the same width wheel, no. That isn't how it works. Offset and backspacing are both just different types of measurement. For example, two different pieces of spaghetti that are both 25.4mm long will both be 1" long. They can't be different lengths.

testpros

Thanks FYRAMS. That's what I thought. CCW seems adamant about an offset of 58mm on the rear. All the measurements I do indicate they will stick out more than I would like. It seems lots of guys are using offsets in the 65mm range with no issues, but CCW keeps suggesting 58mm. I can't quite figure that out.

testpros

Another question. Does a C5 coupe have the same wheel well and backspacing as a C5 Z06? I have a 1997 Coupe.

zeevette

Yes, the only difference is the rear brake cooling vents on the Z.

I have 19x11 with a 65mm offset and 325-30/19 rear tires.

testpros

By the way FYRARMS, beautiful setup. I love that blue.

FYRARMS

Thank you, sir!

6speedsteve

Both my 19's & 20's have 8.650 backspacing the tires on my 19's were about 1/4" overhang past the rim & with -.5 neg camber had about 1/8" poke.

The tires on the 20's are under 1/8" past the rim & with same camber only poke 1/16" the picture with the stick had more camber than I have now, around -.9

1st picture is 19's 2nd & 3rd are 20's

Forgot to add that I have what CCW calls 2" lip, I measured the rears & were about 2-7/16" most of the 3" lip I have seen poke a lot more unless you run more camber.

USAZR1

Those wheels tuck in, really well. If you don't mind me asking, what exhaust is that on your car?