Right Steve - Jon hjertberg of wheelsmith had these jigs for a while - there may have been other sets as well. I could think of a way to do it with a lathe too. I know several people who have ridden cranks so modified. But it scares me a little bit, given what we already know about the failure modes of Campy crankarms. The factory campy NR "triple" arms had slightly thicker arms in the spider where the intermediate bolts went thru, and those arms had a threaded bushing to mount the inner ring. The modified arms simply use a bolt that threads right into the aluminum.
At least for ME, the 42t middle ring does not represent an ideal triple setup. And I use Campy NR front derailleurs with all my TA cranks with no scraping. What's the problem ?
===================================================== Mark Petry 206.618.9642 Beautiful Bainbridge Island, WA mpetry@bainbridgeisland.net
===================================================== "The difference between genius and stupidity is that genius has limits"
Albert Einstein =====================================================
-----Original Message----- From: NortonMarg@aol.com [mailto:NortonMarg@aol.com] Sent: Friday, November 14, 2003 10:03 PM To: mpetry@bainbridgeisland.net; classicrendezvous@bikelist.org Subject: Re: [CR]Put the lime in the coconut and drill the Campy crank...
In a message dated 11/14/03 4:47:17 PM Pacific Standard Time, mpetry@bainbridgeisland.net writes:
If you need gears lower than you can get with a Campy 42-28, may I suggest that you consider a set of TA cranks which are period correct for most classic bikes and readily available ? While they would not look right on a Masi or Pogliaghi, they are an excellent solution that provides lower gears while keeping the vintage spirit intact.
Another option: Ed Litton knows where there is a fixture to drill
Campagnolo cranks to accept a third ring. You can go down to a 36 and it
will still work with a Nuovo Record front derailleur. He will shortly be
able to do this drilling for you (I might add, he did a LOT of them,
"back then") If you need more chain take up on the rear, you can bolt on
a pair of Rally cage plates. A T.A. crank will let you use a smaller
inner chainring, but you will need to find a different front derailleur.
Stevan Thomas
Alameda., CA