Namida12

2006 KHS, Flite 500 with Shimano 9 speed drive train. I changed the front bars to flat top style, and purchased some Campy Record 9 speed shifters. New cables and I have installed a Shiftmate #3 to change the camp pull ratio for the shimano derailleurs and the 9 speed cassette.

I am continually over shifting the front derailleur I am guessing pressing the lever to long without releasing quickly: many times moving from the small chainring to the large 50 tooth ring, chain comes off. I have played with the adjustment on the Shimano derailleur often with no success.

Question 1: Wondering if a Campy Derailleur with a 32mm clamp would fit my seat tube?

Question 2: Would changing to a Campy front derailleur solve the problem of over shifting the chain off large chain ring?

Flite 500
https://www.bikepedia.com/quickbike/B...0500&Type=bike

The shiftmate #3 makes with the campy levers makes shifting better than the worn out 9 speed Tiagra STI the bicycle had when acquired, I ride 50/80 miles each day on Tuesdays and Wednesday each week this month. I am trying to learn how to pedal a bicycle to participate in the STP with son in this July...

JR

Kimmo

Not sure if Campy changed the actuation ratio for FDs when they changed it for RDs, but that aside, I imagine it'd have to.

Although what sort of Campy shifters are you using with flat bars? If you're just using downtube levers, surely it's simply a question of a poorly-adjusted limit screw.

himespau 

are they flat bars or bars with little ramping?

DaveSSS 

Campy left shifters have 12 clicks with far more travel than you'll ever need. Even a Campy triple FD only needs 7 of those clicks. All you should need to do is turn the limit screw in a little to eliminate the over-shifting. Shimano cranks and FDs may be designed for the shift cable to over-travel and return a small amount. Campy shifters don't do that, so indeed, a change to a Campy FD might solve the problem. I once tried a DA triple FD on my Campy equipped triple and never could get it to shift properly. I changed back to my Campy FD and had it shifting properly in minutes.

Namida12

Thanks everyone for all the rapid replies:

The new drop bar I purchased have a wide flat area for my hands to rest upon, thought they were called are flat tops. The levers I am using: Campagnolo Record Carbon 9 Speed ERGO Shifters. I have played with the Shimono limit screw until it will not shift on-to the large chain ring, and then released it enough to climb onto the large chainring. When that happens if I do not shift and get hand off the lever it will over shift and chain comes off. There must be some movement beyond the shift that I am creating by holding the lever to long. If I tap the lever it it will shift correctly, maybe it is me not knowing how to shift. I will change out the entire drive chain to Campagnolo the future, but must do it in increments.

How do I determine what Campy Front Derailleur clamp size I need? 32 mm or? I wrapped string around the tube, and it measures 4 & 1/16 inches x 2.54 = 103.1875 rounded off that is not the measurement i need.

Looking at Geometry for the 2005 Flite 500 there is a notation under the chart "Front Derailleur 1 1/4 inches; 31.8". Does that mean a 32 mm clamp is to big, and will not work?
https://www.khsbicycles.com/Images/Ge...S_geometry.pdf

JR

Kimmo

You could try changing the angle of the FD (is the outer plate of the cage currently parallel to the rings?) - front shifting can be highly dependant on rather small details that are hard not to miss; a bit of trial and error adjusting the derailleur's position can sometimes go a long way.

Or perhaps the Shimano FD just doesn't want to play nice with the Campy gear. I'd be surprised though, cause I've had a couple of Shimergo bikes that shifted just fine. 8spd Ergos with Shimano FDs, but both also had Shimano rings... not that I'd expect that to be much of a factor.

It might be the shifter's fault; when Ergos get old the indexing springs get softer which can make for an automatic overshift effect; often good on the rear, usually not so much on the front. If you're game, you could try disassembling the left shifter and tweaking some life back into the springs if it feels loose.

A 32mm clamp should bite a 31.8mm tube; 0.2mm is SFA. Also, divide circumference by pi to get diameter.

Namida12

Kimmo,

I played with the angle, turning the trailing edge of the FD, (outer plate) fractionally turned towards the non-drive side I have the chain remaining on the ring when shifting...

I did 90 miles Tuesday, and with the wind over 20 miles per hour only managed 25 today... No chain off incidents yesterday or today, I had added few elevation changes on the route requiring on and off use of the smaller chainring. Maybe I am learning how to dance well with these levers, I might have needed to learn how to shift, this is my first time using repairable levers.

Again, thanks this Shimergo seems to be a proper mount for the moment. Now I need to put some considerable more time in the pedals to feel comfortable with this bicycle I am planning to take to Seattle to ride to Portland with my son...

JR