Moving from 18s to 19s or the other way around is not going to make a huge difference. Ive come to accept, after all these years, the butt dyno is not a good reference. The butt dyno reference is used way too much on this forum and almost all non track drivers are not going to be able to tell the difference. I know you want to believe you can feel it but let it go folks. A big difference in weight will induce an affect but it has to be a HUGE difference.
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