• Derailleurs (aka mechs) move a bike’s chain from one sprocket to another under the command of shifters (aka gear levers) in order to maintain a steady pedalling cadence over alterations in terrain.  Electronic gear shifting is trickling down from the high-end groupsets as it becomes increasingly race-proven but mechanical/cable systems still dominate.  The front derailleur is becoming unfashionable as component manufacturers increase the number of sprockets on rear cassettes via ever narrower chains and fewer chainrings.  For years more was more, now less is!  Confused?  Don’t be.  There are pros & cons to all bike transmission systems and experienced mechanics know what’s compatible with what, how to get any bike shifting smoothly and – if they’re honest – whether you really need that extra gear.  With the odd exception (eg Shimano CX), all front road derailleurs are bottom-pull (BP) whereas mountain/touring/hybrid front derailleurs vary between BP and top-pull (TP) or more recently dual-pull (DP).  These letters refer to the direction from which your front gear cable pulls the derailleur.
  • This page also includes a few spare parts – other cable guides & rear mech hangers are here
  • Loads more spares in stock – just ask if you can’t see what you’re looking for or are unsure.
  • Prices do not include postage, contact me if you’re interested.
  • All items are are in very good used condition unless otherwise stated, and are listed in order of price – high to low.