Quote:
Originally Posted by JazzleSAURUS
I think to answer your question, I'd have to reiterate this:
"So a comparable OD and width package in a 16" package will be lighter than an 18" package, but the 18" package will be a bit more communicative, and likely give up a bit of grip. That is, imo, why these cars come with 17" wheels. It balances ultimate grip, (compliance in the sidewall, which helps retain grip during transitions, as well as dampen road shocks from the tire to the wheel,) with communication, (a shorter sidewall is naturally stiffer, which communicates better and offers that 'razor sharp' feeling.)"
In going to an 18 it won't be bad, but you will notice some of the changes. If you want to minimize that, you could go with something like the 225/40. tire OD affects a lot, including gearing, (it's effectively your final, final drive...)
So you'll notice you will lose a bit of acceleration in going to a 225/40-18 based on gearing, and some based on the fact that you're likely adding weight to all 4 corners as well. Going with the 40 series sidewall will retain the majority of the sidewall that the stock 215/45 has, which will help with the negatives mentioned above in going to an 18" wheel.
One of the best ways to combat the gearing advantage you're losing is with a bit of extra power. Something like a JDL header and Delicious EcuTek tune will bring all that acceleration back, and then some, (with vengeance...) and should be perfectly reliable.
This is a bit part of why I've stuck with 17" wheels, aesthetically I think it works great, it keeps the weight down, and I get the benefit of taller sidewalls without the downsides of going too tall. If I wanted to go with an 18" wheel I'd get a taller package, and add power to combat the gearing disadvantage.
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This is all super helpful, thank you. I think you have convinced me to stay with 17". I've been looking at the car a lot recently to see what I want and I think the fitment of the stock wheels on the 2017 is already pretty nice and i really don't want to sacrifice any performance that I already thoroughly enjoy. The difference between 17 and 18 isn't worth that imo.
So if I want tires as close to stock as possible or even keep the stock and use 17x8 Konig Oversteers. The wheel comes in 35 and 45 offset and various PCDs. What do I need to do to have tires and wheels that are flush to the fender without affecting performance/handling?
Sorry, I'm just super paranoid about this and it's taking me forever to figure out so I want to make sure I invest and it comes out the way I want it. You have been remarkably patient in helping me this much already, so I appreciate it.