Like Jerry Moos, I've had good success with 14-28 shifted by Campy NR. Rode that set this afternoon on a 73? Cinelli with a Regina/Cinelli "freewheel." One thing Jerry doesn't note does matter, in my experience: I only try this with a "half-step" set-up. On the Cinelli the 14-28 is mated to a 44-48 front; the four tooth front difference splits the jumps between rear cogs. And, as Jerry says, the "big-big" combination is "verboten." Ain't got a long enough chain for that one. The Cinelli has Campy bar-ends, and these shift almost too quickly, but very crisply, with a "clunk" like a BMW motorcycle. harvey sachs mcLean va.
Jerry Moos wrote: 28T is tricky, but I've done it lots of times. You do often have to accept that the large-large and small-small combos are totally unusuable. Chainstay length and dropouts are a factor also. Works best with long DO's and/or the wheel pushed to the back of the DO. On a Trek 660 with Campy short DO's, I had to remove the adjustable wheel stops altogether to get it to work.
Regards,
Jerry Moos Just back from a ride on the 1972 Falcon San Remo, NR RD, Regina 14-28.
Marie VanRemortel <germanyvrs@hotmail.com> wrote: Ken, 28 is pushing it with a NR, I just went with the Rally, first or second generation versions (looks like a early Crane) would work and looks sweet. They have them on eBay all the time, a new one in the box sold last week for $100 and it wasn't a buy it now : ) Regards, Bruce VanRemortel Wallhalben, GE Eisentraut Lover Spring is coming but it isn't here today... ___________________________
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After reading numerous posts about how one can use a 28T cog with a SR or NR derailleur, I decided to try it on my Mondonico with an NR. After numerous variations of chain length and wheel position in the dropout, I gave up and put on a higher capacity (not on topic) derailleur. Every step forward had a price. Perhaps Campy had accurate part ratings, and perhaps a good shop (are you referring to Assenmacher's?) has some more tricks, but I didn't see where they are. Anyway, it's back in riding condition, so I'm happy.
I did have some chain skip issues on 7-speed freewheels, but I think my chains have been too wide, and the derailleur feathering was too sensitive. Narrower (unmentionable!) chains have helped a lot.
Consult the masters! Go for a bike ride.
Ken Freeman Ann Arbor, MI
-----Original Message-----
From: classicrendezvous-bounces@bikelist.org
[mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of Tom Sanders
Sent: Saturday, March 25, 2006 7:00 AM
To: classicrendezvous@bikelist.org
Subject: [CR]Skipping chain