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2009 GT, Black, Roto-Fab CAI.
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Discussion Starter · #1 ·
I am going to upgrade my brakes using the G8 kit's off the ZZPerformance web site; front and rear.

But, before I do this, as my GT is black, I am going to change to black 19" wheels. Maybe 20's but leaning heavily to staying with 19's.

The question(s) is(are).. how, what, where do I measure to make sure the new wheels will clear the 4 piston calipers without adding a spacer, if I can? I would prefer not to deal with newly mounted wheels that don't fit.

I am going to keep the stock GT wheels. Can't discard anything I may replace off this car.

Thanks in advance.
 

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Ask the company you are buying them from on their clearance information. Tell them you are putting them on a G8 GXP if that is the ZZP kit you are using.
 
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For what it's worth, typically 20" tires are less expensive than 19" tires.
 

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Discussion Starter · #4 ·
I'll look at both before I purchase and I would guess 20" wheels should alleviate my clearance concern?

If I go with 20's, do I need to worry about the speedometer being off?
 

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Speedometer may be off a little, but insignificant enough to write home about. Went from 18"s to 19"s with zero issues. Purchasing the same or similar diameter tire may help ease the conscious.
 

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Go with the right tire size and it is fine.
 

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I'd get the 19"s. 20"s ride really rough. My pregnant wife hates riding in my.car with the 20" Camaro wheels. Also there are more performance tire options available for smaller wheel sizes than larger wheel sizes.
 

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The one thing no one talks about until it’s too late is the weight. It will slow you down, spoil the ride ,handling and braking. If you put Camaro 20’s up front. They are just over 30 lbs each. The rears 32 lbs. Our stock 19” are 26 lbs each. If you look for better light weight wheels. The 18” to 19” will be 18 to 20 lbs each. Wheels like Apex reduce rotational mass to offset the increase of the rotors from big brake kits. Stock 321mm rotors are around 18 lbs. Camaro 355mm are 25 lbs each.
 
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I'm still not 100% sold on my 20"s. Everyone who sees the car seems to like them but I'm still meh. Maybe if the car was lowered a bit. Definitely a significant trade off going to a bigger wheel, though.
 

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Could always just get wheels for fitment on the VF chassis cars... Brembos all around for 3 of the years and fronts for all. Might not be as aggressive a fitment as something more custom, but just a suggestion.

-J
 

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I went with 2012 19' Buick GS rims, clear Brembos no problem.
20210404_161638.jpg
20210404_161710.jpg
 

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Oooo that's right forgot about the Buick rims! Seen a few sets on PPVs, look great. Good call.

-J
 

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Detroit Wheel and The Wheel Exchange have them in black if so desired.
20210609_165839.jpg
20210609_165956.jpg
 

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Thanks Pony Man 👍.
 

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Just incase.
20210404_162406.jpg
 
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Nothing wrong with going to 20" wheels. The problem is most people buy cheap, heavy, cast wheels. There are forged 20" wheels out there that weigh less than most 19" cast wheels, but they are expensive. Like most things in life, you get what you pay for.
 
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