Wayne,
Did you get any responses from the experts on this stuff? If not, here's my theory: the shorter spindle is meant for an earlier crankset with the covers on the back surface of the crank arms. Or perhaps they're meant for steel cottered cranksets, which typically have thinner arms than aluminum alloy cranks.
By the way, I would have thought that pedals meant for use with raised lip cranks would have a longer threaded section.
Best regards,
Fred Rednor - Arlington, Virginia (USA)
> From: Wayne Davidson <wayne.collect@xtra.co.nz>
\r?\n> Subject: [CR]Campagnolo record pedal with short thread
\r?\n> To: "CR" <classicrendezvous@bikelist.org>
\r?\n> Date: Monday, July 21, 2008, 3:22 PM
\r?\n> Hi all, I've got 2 old Campagnolo Record pedals with the
\r?\n> toestrap hoop,
\r?\n> one has a thread about 1mm shorter. I take that its used on
\r?\n> a raised lip
\r?\n> crank?, I looked up the archives with no luck, anyone got a
\r?\n> date range
\r?\n> for these?....regards wayne davidson invers NZ........