[JHU]

In another thread on this web site, Russ R wrote this:
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Sorry I didn't get back to you earlier, Kevin...
I use the "Vintage Blue Streaks" at the track- nice and sticky, but aren't (quite) full-blown slicks, in other words they have "chicken scratches" on them.
I run:
"Firm" #3002's, 6.00-15's (8.4" actual width) up front, and
"Firm" #3050's, 8.00-15's (10.1" actual width) in the rear.

Don't be fooled- these aren't "firm" in any sense other than they'll last several season's worth of open track sessions.
I get rubbing on the rear, but that's because I have soft springs and 289 FIA fenders!
Soon to be remedied!

Russ R
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What does he mean by actual width... are these wheels that bulbous?
Could this be a effect of a wide rim? If I say put the 6" tire on a 6" rim would this pull in the sides somewhat..?

Best regards
Jon
Norway