Don't know much about tubing but found a bike with Ishiwata. I know that sheldon brown says this is a good quality tubing but were there varies tiers of tubing?
I'm not sure I'm sayign this right..
Like, Reynolds 531 and Columbus SLX are on some sort of "quality" scale. Does Ishiwata tubing have something similar? For instance, Ishiwata EX is awesome cuz it's light and double butted, blah blah.. but stay away from Ishiwata XX cuz it's just straight tubing.. or something like that?