Quote:
Originally Posted by Kulebrero
I might go with 225s to see how they feel.
Question is, should I stick with 17” or move up to 18”?
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You have to keep other things in mind. 17" offers enough sidewall that the tire isn't going to feel sloppy like a 16" with a 55 series sidewall, but the 18" is going to start adding more weight to the wheel. Generally the crossoverpoint in terms of weight in 17-18 inches in tire because 18" tires sometimes have more or the same weight as 17", but the 18" wheel can be heavier than 17.
In general, track guys looking for weight savings generally stick to 17".
Tire sizing with width, given the wheel is wide enough, the 245 is going to be faster. Remember that the course this is being tested on is more of an autocross style course. I'd still prefer 245's for autocross. It would really be coming down to the feel of the tire making the driver's faster and pushing more. I'd still edge that given the actual lap times are so close between 225 and 245 on the 9", 245 is probably going to come out on top at a larger circut style track.
245 is the go-to for STX on a 9" wheel for these cars, tried and tested over years. No one is running a 225 on 9" because it magically is faster.
Quote:
Originally Posted by Kulebrero
I might go with 225s to see how they feel.
Been having brake issues. Just upgraded to 325mm BBK, but might have to move up to 340+mm which would require 18” wheels.
Decisions.
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Quote:
Originally Posted by Kulebrero
Been having brake issues. Just upgraded to 325mm BBK, but might have to move up to 340+mm which would require 18” wheels.
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The brake issue doesn't make a lot of sense to me. Generally any BBK is going to get the job done for 95%+ of people. Going from a 325 to 340mm, you better be absolutely pushing the extreme limits of the 325, going for all out lap times in a damn near race car.
Point is, any braking issues you're seeing on a light BRZ aren't going to be fixed increasing brake size like this. It's probably more pad related or perhaps even tire related. I don't think this is necessary at all, especially for the cost.