Jan. 31, 09
Hello John, cc List,
you didn't mention your gearing, but if you have the original setup, your inner chainring is no smaller than a 36. Assuming a 52-54 tooth outer, you only have a difference of 16-18 teeth, which your NR front
derailleur should be able to handle without any problems.
The problem is that your front derailleur isn't shifting far enough to
the left, as seen from behind. As long as you don't alter your rear wheel, you have four variables which you can change to solve the problem; 1. the derailleur 2. the crank 3. the chain 4. the bottom bracket
1. Adjust the screws so that the NR derailleur can shift as far to the
left as possible. Make sure the outer plate is as low as possible without touching the large chainring, about 0.5 mm are enough. Lastly,
check if the outer plate is roughly parallel to the large chainring, rather than the end pointing outward. No go? You can rotate the rear end of the derailleur inwards a bit, but only so far as not to impair
general shifting.
2. If that didn't help, you could theoretically shorten the bolts holding the inner chainring so that the inner ring goes towards the right. I really wouldn't recommend doing this. It'll also limit the shifting range of the inner.
3. Put in a vintage style, wide chain in case you have a narrow chain
mounted.
4. Then there's your bottom bracket. You could insert a 0.7, 1.8, or 2.5 mm ring or some combination thereof (these are Hollowtech II spares) between the fixed cup and the frame. This'll move everything to the right and give your derailleur a better chance. However, if you
move the BB too far, you'll no longer be able to thread down the lockring on the adjustable cup.
If none of this suffices, it could be that either your bottom bracket
axle or, more probably, your right crank arm is too worn to give the front derailleur the space from the seat tube it needs. In that case,
you'll need either a different, longer axle and/or a different derailleur.
Greets
Kai Hilbertz Munich, Germany
On 31.01.2009, at 18:38, <pugsx2@aol.com> wrote:
> Dear members,
>
> I own a '71 Raleigh Professional fastback. I recently acquired and
> replaced
> the original crankset to a vintage Campy Nuovo Record Triple crank
> set (also using the correct Triple bottom bracket axle). With the
> original C
> ampy Nuovo Record front derailleur I can only move the chain to and
> from the
> two largest sprockets. I cannot seem to get to and from the third/
> smallest
> sprocket on the crankset. Can someone with vintage Campy Triple
> crankset exp
> erience tell me whether I need to replace my front derailleur, and
> what mode
> l I need? Also, if you happen to have one for sale or knows where I
> can find
> one, I would really appreciate your help. Thanks \u2013
> Sincerely,
>
> John LeeWong
>
> La Canada California