I have 2 sets of wheels for my track only 748r, Marchesini stock wheels that came on it, 5.5” rim, ran 180, got a set of mag Marchesini from Steve at the old ECS in NY, 6” rear, run a 190, the tires both look correct rim to tire. Tip in still felt faster with the 6” because the wheels are so much lighter, I know same/same wheels/tires the 180 would be quicker turn in. The CF wheels I like and am looking at stop at 5.75”, was wondering if the 180 would be more stretched or the 190 more bunched, which bridged the .25” gap better.