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Old 04-09-13, 03:04 PM   #1
leunkstar
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Front derailleur to far from seat tube? Cant reach inner chain ring

Hello,

my bike, based on a Dedacciai U2 frame, is nearly finished:

Mostly 6500 ultegra, 7700 DA shifters and FD-6600. Crankset is a Bianchi labeled crank but I guess it's a 53/39 FSA K-Force Light (can someone comfirm?). Bottom bracket is a Truvativ Gigapipe Team SL (ISIS based) 108mm

Anyways; my front derailleur is a Shimano Ultegra FD-6600 connected to the seat tube via a noname clamp. Nothing special. But with the limit screws totally unscrewed the base level is already to far outside. What's incompatible? The Clamp, the FD, the length of the bottom bracket axle (108mm) or something else?

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Old 04-09-13, 03:13 PM   #2
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The cable is certainly slack so that's not the problem.

I'm assuming that you've pushed the FD in with your fingers. Have you checked that a pebble or something else isn't jamming it?

Is there in/out adjustment on the clamp? Maybe rotate the clamp forward some or maybe even backwards?

You may need a wider crank.
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Old 04-09-13, 03:25 PM   #3
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The cable isnt even connected.

I ran to the shed and afaik nothing is blocking. I'll check again in broad daylight tomorrow.

No adjuster on the clamp. I do have a second one (the shimano SM-AD11) but I think it has the same reach.

I did some desk research and 108mm seems to be a bit narrow isn't it? Just this specific Gigapipe comes in 108, 113 and 118 mm.
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Old 04-09-13, 03:48 PM   #4
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Hard to tell from the pictures but it seems the fd is rotated with the tail too far out and isn't parallel with the big chainring. Try realigning it and see if that helps.
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Old 04-09-13, 04:09 PM   #5
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Did you match up the bottom bracket to the crankset as the crankset will determine the proper bottom bracket size.
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Old 04-09-13, 04:25 PM   #6
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Longer BB, move the chain rings out..

Example.. Campag's last Square taper , the 9/8" steel seat tube version is 111,
the oversize Al version is 115. ie 4mm longer..

the OD of the frame tube is further away from the centerline..
So, FD is also moved out, ... so you, proportionally, move the cranks out.

by the r difference between the 2 tubes. _ .5625" is half of 1 & 1/8"

Last edited by fietsbob; 04-09-13 at 04:35 PM.
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Old 04-09-13, 07:57 PM   #7
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Quote:
Originally Posted by fietsbob View Post
Longer BB, move the chain rings out..

Example.. Campag's last Square taper , the 9/8" steel seat tube version is 111,
the oversize Al version is 115. ie 4mm longer..

the OD of the frame tube is further away from the centerline..
So, FD is also moved out, ... so you, proportionally, move the cranks out.

by the r difference between the 2 tubes. _ .5625" is half of 1 & 1/8"
This is a correct answer but you have a talent for phrasing good advice in a way that almost indecipherable even to those who understand what you are saying.
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