Shimano 105 fd 5800 front derailleur sizes

rob39

So the hex screw holding the cable on the front derailleur has sheared off, leaving a piece in. So needing a new derailleur but I see when ordering one it come in a couple of sizes 34.9mm & 28. 6 / 31.8mm. What does this relate to and how to know which to order

StillGoing

rob39 wrote:

So the hex screw holding the cable on the front derailleur has sheared off, leaving a piece in. So needing a new derailleur but I see when ordering one it come in a couple of sizes 34.9mm & 28. 6 / 31.8mm. What does this relate to and how to know which to order

Your seat tube diameter for band on derailleurs. Do you need band on or braze on? If braze on, you're looking at the wrong derailleurs.

rob39

It's braze on, seen one on ebay £13

imposter2.0

If it's braze on, then then you've been looking at the wrong type..

dimmockg

Chain reaction have ultegra 6800 braze on for £15