Sry for missing your point. No I have not had many issues with American Racer MD 56s as to sizing. BUT I would call your local American Racer guy and ask for help if you are having trouble, the dist. in my state was great in helping me with an issue a couple years back unlike the Hoosier guy.
I take mine to the hotmarks.. let sit a minute then set to pressure.. Usually I have to stretch my RR's a little.. We only run Hoosiers but was told by guys on Racers they do it the same way as I do.. Can you get bigger LR hotmarks??
I always air them to 25 and let them sit for about 15-20 minutes then let them down to race pressure. You'll need to check them once or twice cause the pressure will go up as the tire shrinks. Also racer LR's will grow at least an inch real quick on the track.
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