As you say, these are not both left arms, but the taper on the mod 93 left is the same as on the right, so I think I was wrong in initially assuming the left arm was the same for both model. Not sure why, you would think they would have saved a bit on tooling by making the arms the same, then the left arm could have been common to both models.
In a pinch, though, you could use a mod 93 left with a mod 99 right and only the real Francophiles would ever notice. Closer than a combo I have - Zeus 2000 right with original Dura Ace left. The problem is that the Zeus 2000 right is 167.5 and the only 167.5 left I could find that looked even remotely similar was the Dura Ace. Anyone have a spare 167.5 Zeus 2000 left? Ha, fat chance.
Regards,
Jerry Moos Big Spring, Tejas, EUA
John Thompson <JohnThompson@new.rr.com> wrote:
Jerome & Elizabeth Moos wrote:
> I had some further discussion offlist and looked at some photos
> again, and I think you are correct. The early/mid 70's mod 99 does
> appear to narrow noticeably just a bit below the crank bolt holes,
> while the mod 93 tapers uniformly from top to the pedal hole. Thus
> the Mod 93 arm looks to be slightly wider, though not dramatically
> so. I need to actually pull out both cranks and compare side by
> side.
The arm taper is quite different in the two models:
http://www.os2.dhs.org/
That's the mod.99 (left) on the bottom and the mod. 93 (right) on the top -- sorry they're not both left arms, but I'm still looking for a 165mm left arm to go with that mod. 93 right arm. Anyone got one to spare?
--
-John Thompson (john@os2.dhs.org)
Appleton WI USA