Replacement front derailleur

wotnoshoesehwotnoshoeseh Posts: 481
edited 25 September in Road buying advice
Hi,
I was about to install a Tiagra 4500 groupset to a frame I have here. The problem I have is that the front derailleur is a band on type with a 34.9 band. I need a 31.8.

Other than a FD4500 front derailleur, and as I will invariably be trawling the bay (or other sites) looking for a replacement, what other series are compatible with the ST4500 levers?

I'm thinking....
FD4600
FD3400

I've seen FD4503 available but I'm not sure if there is a fundamental physical difference between that of the triple and the double? Any advice greatly received.
GT Series 4 2010
Felt F4 2012
Giant Defy 1 2014 - now gone!!
2016 Kinesis T2 V3 w 105 groupset
2016 Kinesis Aithein - R8000

Posts

  • Cheers. Good call
    GT Series 4 2010
    Felt F4 2012
    Giant Defy 1 2014 - now gone!!
    2016 Kinesis T2 V3 w 105 groupset
    2016 Kinesis Aithein - R8000
  • You can just get a reducer.

    Google or eBay this - Shimano SM-AD17 Front Derailleur Clamp Band Reducing Adapter - 34.9mm to 31.8mm
  • WheelspinnerWheelspinner Posts: 4,169
    Or, you could just ask your LBS. Every Shimano FD from new now comes with the adaptor shims. They make all band-on ones these days to fit a 34.9 tube, saves manufacturing cost if they don't have to do different clamps sizes, and ship them with the little plastic semi-circular spacer shims to suit 31.8 and usually also 28.6 mm tube diameters.

    Your LBS probably has a box full of spares.
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