On 9/25/19 12:28 PM, Garth wrote:


  All I can say about front dérailleurs is that I've found that double FD's work on triple cranks much better than triple FD's.


Not universally true.  I've recently put a Tiagra FD4603F triple on my Weigle, which has a 24/34/46 Herse crank (10 spd SRAM PG1070 12-32 cassette).  This particular derailleur seems to be made for gearing just like mine and works amazingly well, better than any of the doubles I've tried.  Previously I had a Tiagra double which worked until the LBS messed with it, and then simply wouldn't work properly any more no matter how they adjusted or bent it, and before that a Campagnolo double that wouldn't shift to the small ring at all and only reluctantly shifted between large and middle.  It's simply bloody amazing how well it works.


  My Bombadil, which I ride the same as I would any road bike, for example, with a Andel 24/36/46 crank, chainline about 46 or so.... a 9-speed Shimano Tiagra 4400 double FD shifts swiftly and precise, it's simply excellent in every way !  I previously had used a 80's Deore MT60, which was slow and not so precise. *Triple cranks with rings in the 24-50 teeth range don't need triple FD's, assuming friction shifting.* The 4400 FD I'm using could easily handle a wider chainline also, as would most any road FD, at least from 9-10 speed and below.

So use a road FD , and you'll grin from ear to ear !


Or, use the 10 spd Tiagra FD4603F and be amazed.

--
Steve Palincsar
Alexandria, Virginia
USA

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