I lowered my 997 C2S by about 1" and the stock lobster rims look a bit weird.

What are you guys running for wheel spacer size? I've heard 5mm in the front and 15mm in the rear. Also, at what point do I need longer bolts.

I am also looking for aftermarket rims for track use. What is the ideal offset to get a nice flush setup?

Thanks

 

Take a level and put it up to the top of the fender metal center of the wheel, measure how far the rubber or tire is away from the level and you have your spacer thickness......mine was 12 and 15 mm front back respectively

 

w/ 5mm you're safe with stock bolts. Get longer bolts after that. Though there are longer OEM bolts for use with 5mm spacers.

 

I have a set of Carrera S II wheels from a "4" model. 17mm more in the back. Looks great, flush against the rear wheel arches. I only did 5mm on the front.

 

12/15 to get them flush, new bolts accordingly for the added spacer length. Or just get some aftermarket wheels with the 12/15 offsets built in (subtract 12 and 15 from your current wheel offset to get the specs you want).

 

listen to mcJimmy 12/15. 5/7 in the front is wayyyyyy too mild, tons of room left.

personally i have 15/16 (on oem height) but if lowered , you can do 12/15 imo no problem without issues.

 

What's the typical offset to get flush with the fenders?

 

if u have the standard oem 8inch/11inch oem wheel setup, you need 15mm for both front and back to get flush with the fenders. owners are normally more conservative in the front to avoid rubbing issues.

personally i am running 15/15 on oem height.

 

Thanks..... I was just thinking about this today.... I like the appeal of having a flush look but was thinking about what downside are there ? Do the wheels kick up more rocks and dirts to hit the body of the car when they are flush ?

 

yup , definitely does. and same with the tire shine gunk as well!

 

Thanks everyone!

I wonder if anyone has a definitive formula for flush rims on a narrow body 997.1?

I'm think it would be something like:

FRONTS
Width = 8", Spacer mm = (72mm - Offset)

Width = 9", Spacer mm = (59.3mm - Offset)

REARS
Width = 10", Spacer mm = (94.7mm - Offset)

Width = 11", Spacer mm = (82mm - Offset)

Does that make sense?

 

Sure does.. that is what I was looking for.

Good calculator if you know what you want below.

https://www.rimsntires.com/specspro.jsp

 

3mm is the longest spacer I'd run with stock bolts

 

www.willtheyfit.com
This will help you figure out exactly what you need.
15 mm front and back will flush the wheels out nicely

To move the wheels out 15 mm you want less offset.
So on your stock fronts 8 with 57 offest, you want 8 with 42 offset.
On your stock rear 10 with 58 offset, you want 10 with 43 offset.
Going to 9 /11 's you can use the above link to figure out the proper offsets

 

You are over thinking this one. Formula's and online calculators are great for comparing or calculating new wheels relative to your current wheels. This is especially true when wheels sizes are different (18" vs 19"), widths are different (8" vs 8.5") and offsets are different (more dependent upon widths but you get the idea). But it falls apart once you deviate from a stock setup. Which OEM suspension came with the car, the suspension mods installed, how low relative to stock the car sits, and the current alignment settings all affect the tire gap. So there is no magic formula, just calculators to get you close.

If your case you have wheels already mounted on your car. Your car is lowered. You want to move the wheels outwards. Spacers will do this. The question is "how much"? Well the answer is simple - measure the gap in mm's between the top of the wheel and the fender. Then put spacers with matching longer lug bolts in to push the wheels outwards. The spacer thickness will be slightly less than your measured amount. For reference you should be in the neighborhood of 15mm in both the front and back. Could be more if the car is dropped a lot and has an aggressive alignment.

So, measure the gap and buy spacers with matching longer bolts. Simple. And if you want to change the spacers, sell the current setup in the marketplace and buy another set.