Triple crank to double crank, what else do I need to change?
I posted this over in the road bike forum but it was suggested that I post it here instead (sorry about the double post, mods feel free to delete the one in Road bikes).
I'm thinking of switching my triple crank out for a double. I've got Shimano 105 shifters. Can I just use the same shifters and set the Der stops to accommodate the double or do I need to get new shifters? I assume I can use the same front Der (Shimano Tiagra)?
How many cogs do you have in back?
Shimano rates their 9-speed shifters as either double or triple compatible. I don't know what the exact difference is. If it was my bike I'd give it a try and see if I could make it shift to my satisfaction.
FWIW, I own two bikes with Ultegra 9-speed shifters. On the tandem triple I get 1 shift position for the granny, 2 shift positions for the middle ring and 1 shift position for the big ring. The klein double has 2 shift positions for each chainring. Both bikes have flight Deck computers and both indicate the appropriate chainring in all shift positions so I know I've got them set up as Shimano intended.
I've got 9 in back. Thanks, didn't know the shifters did both. IIRC there are four stops on the front shifter just like you indicate.
Originally Posted by Retro Grouch
Low car diet
If the shifter works for a triple, it will also work for a double. You'll need to decide which two of the three positions to use on the shifter. There are pros and cons of using either inner/middle or middle/outer.
The front derailleur should be fine.
Originally Posted by slopvehicle