I might have the chance of picking up a very nice new bike for a very reasonable price. The only drawback is that it comes kitted out with a dura ace 11 speed groupset. Unfortunately my bike stable and wheel collection are all 9 speed and I would like to maintain the interchangeabilty this gives me. In fact I cannot see me ever needing to go beyond 9 speed as most of my bikes will probably outlive me.

My question is therefore will the 11 speed front and rear mechs and the brakes work quite happily if I swap the dura ace 11 speed STIs for one of my 9 speed dura ace sets. Will the 11 speed chainset also work quite happily along with a 9 speed chain. If this is the case the bike will move from a being very reasonable to an excellent price as I can sell the STIs and the wheel set and utilise my existing STIs and wheels.

Graham.