Sounds like just a quality control problem, unless they were made for some really obscure obsolete thread standard. TA did a couple of years ago make some pedals that were supposed the fit both BSC and French cranks. The thread diameter sorts of split the difference between the two, French being slightly smaller. The pedals were just slightly loose in BSC cranks, and took more than average force to install in French cranks. I still have one such pair NIP as well as a couple installed.
But it sounds like you are saying your pedals are too tight to thread into either BSC or French cranks. So this one has me puzzled. American Ashtabula cranks like those found on some fillet brazed Schwinns and lots of middleweight and heavyweight American bikes used 1/2" pedal thread, but in the unlikely event that TA did make those, they would be loose in both French and BSC cranks - probably wouldn't even engage. Not like TA to have that big a manufacturing error, although some of their recent pedals aren't as well made as their old ones. But In The Day, their quality control was far superior to, for example Lyotard, and some would say the equal of Campy. So this still seems very strange and leaves me thinking these might be made for some thread standard I'm unaware of.
Regards,
Jerry Moos
Big Spring, Texas, USA
> From: dan polito <ciclipolito@gmail.com>
\r?\n> Subject: [CR] modern TA pedal thread problems - any history?
\r?\n> To: classicrendezvous@bikelist.org
\r?\n> Date: Monday, February 2, 2009, 1:41 PM
\r?\n> List -
\r?\n>
\r?\n> I apologize if this is OT, but due to the classic content
\r?\n> of TA as a
\r?\n> company, I felt it was appropriate.
\r?\n>
\r?\n> I recently purchased a brand new set of contemporary TA
\r?\n> piste pedals
\r?\n> direct from the importer. The box and bag are marked 9/16
\r?\n> x 20,
\r?\n> standard BSC threads. When trying to install these pedals
\r?\n> into marked
\r?\n> BSC cranks, I am having some difficulties.
\r?\n>
\r?\n> I attempted to install the pedals onto the following arms,
\r?\n> all marked
\r?\n> BSC: NOS Mavic 631 cranks, used sugino super comp, used
\r?\n> campagnolo
\r?\n> super record, new dura-ace pista. I retapped the suginos
\r?\n> for fresh
\r?\n> threads, and still no luck.
\r?\n>
\r?\n> I then attempted to install the pedals onto the two
\r?\n> french-threaded
\r?\n> cranksets I had lying around the shop, a TA pro 5 vis and a
\r?\n> stronglight competition steel cotterless. these would also
\r?\n> not thread
\r?\n> in.
\r?\n>
\r?\n> I have installed many pedals, both new and used, to many
\r?\n> cranks, both
\r?\n> new and used. I have never had this problem before.
\r?\n>
\r?\n> Has anyone else had any similar problems with these pedals?
\r?\n>
\r?\n> Thanks.
\r?\n> Dan.
\r?\n>
\r?\n> --
\r?\n> cicli polito
\r?\n> 1433 east 33rd st
\r?\n> down rear
\r?\n> cleveland ohio 44114
\r?\n> 440 263 1263
\r?\n> ciclipolito.com