As mentioned the first question is do you want 'rake'? Rake can be achieved through your suspension and/or rims. In the end its going to be a personal style choice and depend on your overall car attributes. I'm assuming you have a 'level' ride height, is it lowered or stock height? Do you like a little tire or do you like low profile. 17's with 50s can equate to a 19 with 40s (roughly). I find the best thing to do is have a person look through car examples (100s on this forum, pro-touring, team camaro) find a look and stance and then ask that owner/builder for the details. Sometimes even the rim choice itself will sway you one way or another once you see it on a car.
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