I have used Rivendell Ruffy-Tuffy tires on 700C Super Champion 58 rims at 110 psi on a tandem. Maybe you have a bad match of rim and tire, and a different tire might be a good choice. In the latest Tour (German magazine) test, the Contis were very easy to mount (which seemed to be their only redeeming feature, as their rolling resistance was high, their cornering poor and their reliability just average). So a tire that is "less easy to mount" might fit better. Or you may have an undersize rim. But in theory, the Super Champions rims work as well as any new ones.
Jan Heine, Seattle Editor/Publisher Vintage Bicycle Quarterly c/o Il Vecchio Bicycles 140 Lakeside Ave, Ste. C Seattle WA 98122 http://www.vintagebicyclepress.com
>I can't seem to inflate Conti Ultra Gaterskins on my 27" Super
>Champion 58 rims above 90 psi without the tire blowing off the rim.
>It is on a tandem so 120 psi or so would be nice (we are no an
>especially lightweight team). Has anyone found a modern tire that
>will stay on this rim at these pressures? The SC 58's seemed to be
>a quasi hooked bead rim. I think that I recall that Conti Sport
>1000's were a bit better at staying on at higher pressures but were
>more flat prone. Any tricks to getting the tire to stay put?
>Classic content are the rims and the bike, a '73 Jack Taylor curved
>tube tandem.
>
>Thanks!
>Paul Raley
>Nice riding weather in Leonardtown MD
>
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