Hi Lou, Not certain about the rim stuff, but definately know about 531SL, it stands for 'special lightweight' and used to be highlighted in red on the decal. as for the SL Columbus, you might be right in thinking it stands for 'super leggere'
Cheers, Kevin [in not quite as Sunny and hot Somerset UK] Sayles
----- Original Message ----- From: <LouDeeter@aol.com> To: <classicrendezvous@bikelist.org> Sent: Sunday, February 10, 2008 9:04 PM Subject: [CR]Question about 27 vs 700 tire widths and SL
> While frying my brain in the hot sun of south Florida this weekend,
> several
> questions came to mind:
>
> 1. If I compare 27x 1" tires to 700x25, one would think that the 700x25
> would look thinner, but not my experience. Likewise, 27 x 1 1/8 seems
> narrower
> than 700x28 and 27 x 1 1/4 certainly seems narrower than the Gran Bois
> 700x30.
> Am I missing something in the calcution of converting inches to center
> with
> 2.54 x 1 inch?
>
> 2. Second, is the SL of Columbus SL a literal translation of Super
> Leggere(a) or Super Light? Does anyone know if the same SL translation
> was used for
> 531SL?
>
> For those of you who are suffering through the winter hibernation season
> up
> north, Florida is well into its springtime. Lou Deeter, back in Orlando
> after
> enjoying the South Florida sun.
>
>
> **************
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