I'm running 18/65 right now... I'm sort of relegated to running that spur, it's a RR steel spur. It is still too low for the ported Epic. I am going to order a 20 and a 22 next time I order parts.

I saw in another thread you were talking about I beleive 18/63 or 62. This is an excellent choice for the OS18. There will be much more acceleration than before, and more top-end too, topping out around 45 with short tires such as Road Rage IIs. Forget speeds people claim, I am working on some video with radar in it...