Hi,
Friday, November 13, 2009, 9:01:52 AM, Jeff Slotkin wrote:
> 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...
FWIW: I've been using Rigida rims, similar to the currently available from Jan Heine Grand Bois rims, similar to old Super Champion M58 - no hooks at all, as can be seen from the photo on Jan's site - with modern clinchers (Grand Bois 28mm and now Michelin pro2 25mm) pumped up to about 100psi for several years now, on a rider - no problems, so far. (Knock on wood...)
> 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
>> _______________________________________________
> _______________________________________________
--
Cheers,
Dmitry Yaitskov,
Toronto, Canada.