I think you should be using hook-bead rims or tubulars on a bike you're planning to ride. I know this is CR and we like old stuff, and nothing else looks like Concaves, but...
Maybe I'm just chicken.
Jeff Slotkin, usually at The Bicycle Shoppe, Charleston, SC
On Nov 12, 2009, at 10:48 PM, John Siemsen wrote:
> I've been using 32cm wire bead Avocets on these 21mm Weinmann
> concaves on my regular rider Medici Gran Turismo for over a year
> without incident. They're kind of heavy and collect water and dirt,
> however sturdy. Make sure the bead seats evenly.
>
> John Siemsen
> Portland, Oregon
>
>
> Message: 7
> Date: Thu, 12 Nov 2009 13:44:36 -0600
> From: Mark Stonich <mark@bikesmithdesign.com>
> Subject: [CR] Fat 700x28s on narrow Weinmann Concave Rims?
> To: <classicrendezvous@bikelist.org>
> Message-ID: <E1N8fac-0004bs-HY@elasmtp-scoter.atl.sa.earthlink.net>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Due to the lack of a hook bead I was wondering if anyone has
> successfully used narrow (under 21mm outside dimension) Weinmann A124
> concave rims with modern 28mm tires that actually measure 28mm (or
> even a bit more.) The old catalogs listed them as being 700x25 but
> the nominally 25mm Specialized tires that came on the wheels were no
> wider than the rim.
>
> I'm hoping to use 700x28 Michelin Dynamics. I've not seen the 28s
> up close yet, but the 32mm Dynamics are the plumpest 32s I've ever
> seen.
>
> Mark Stonich;
> BikeSmith Design & Fabrication
> 5349 Elliot Ave S. Minneapolis, Minnesota 55417 USA
> Ph. (612) 824-2372 http://bikesmithdesign.com
> http://mnhpva.org