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Front derailleur size help.

ThePriory1978ThePriory1978 Posts: 563
edited March 2012 in MTB workshop & tech
Hi all,

My front 9spd derailleur on my 09 Kona Caldera has got sloppy and stopped shifting properly.
I need a replacement but I don't know what size I require. I have the choice of Dual pull 28.6/34.9 size or 31.8/34.9?
Does anyone know what size I require? The Kona site is off no help.

Many thanks

Snot green Canyon Nerve AM 8.0x


  • The RookieThe Rookie Posts: 27,804
    What size is your seat post clamp, most seat tubes are a continuous size and on 99% of bikes the FD clamp is the same size as the seatpost clamp.

    Otherwise just remove it and see what it says inside, most AM Shimano are 34.9 with spacers for 31.8 anyway. (28.6 is rare for an ally frame, tends to be steel only).

    Current steed - Whyte T129, 2013 frame, mongrel Revelations, Giant dropper, Stans S1 wheelset. 12, Magura Trail Sport brakes, 1x11. 12.8Kg
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