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I'm contemplating the idea of switching from a triple crank to a compact double with a 32 cog in the rear. I understand I would need a long cage top normal derrailleur but I'm confused if these are normally compatible with STI road shifters. Does anyone know what I'd need to be looking for?
There was another thread about this a while back, if you have a GS (long cage) rear derailleur (which is common on triples) you might not need a MTB derailleur.
The indexing is the same for road or mountain (as long as your new cassette has the same number of cogs).. so shifting shouldn't be impacted if you did swap out the derailleur.
mtb rear derailleurs will work with road shifters.Quote:
Originally Posted by MDHillSlug
If my existing RD will work, I still need:
Cranks
Bottom bracket
Can a triple STI work a FD double? I assume I need a new shifter?
Anyone know where that old thread is?
Usually, the answer is yes. I intentionally set up my compact double bike with triple shifters and a triple front derailleur. It just requires proper adjustment of the limit screws to basically eliminate that third click.Quote:
Originally Posted by MDHillSlug
I would give it a try. If it doesn't work, you can look for a double shifter.
Oooooh... I could get rid of my triple and make it a compact double with the fsa gossamers I took off my litespeed...Quote:
Originally Posted by Becky
But then, I've got 2 sets of carbon triple 165 cranks that I feel obligated to use on something.
My bike has a compact double on it, but can take a triple. My shifter still has that extra click in it for the third ring. When I first got my bike, I thought I broke it (fell in the parking lot and the hood moved over). I pushed it back into place, then took off (so embarrassed! :eek: ) A block away, I couldn't figure out why my bike wouldn't shift back down, I must have broken it!!! So, I rode back to the shop, and they explained it to me. I had just shifted into the "ghost" ring and had to double click back down :pQuote:
Originally Posted by Becky
The moral of the story - it should work.
Mine has a trim click between the first and second click, but I can't get to the third with the way it's set up. I use that trim stop a lot while in the small ring to get the biggest range on the cassette without rubbing on the front derailleur cage.Quote:
Originally Posted by JennK13
Yours might have the same.
i am running a xtr mountain bike rear derailleur with shimano 105 shifters on my cycle cross bike with no problem.
it is a 10 speed shifter with a nine speed mountain cassette(34-11) as well. i just have the extra click set up at the 11 on the cassette.
I've used a lever for a triple on a compact double crank for a couple of years with no issues. That same bike now also has a wide-range cassette (11-34) on it with an Ultegra dérailleur (6700 GS). The derailleur's capacity was the key number in determining if it would work with the cassetteI wanted to use. Previous model numbers wouldn't have worked for what I wanted to do.
It now looks likely that I'm going to replace this bike within the next few months so I'm not going to make the conversion. However, my new bike will have a compact double and I'm planning to have the RD switched to a long cage so that I can make this happen on the new bike.