Vanity quesiton - triple to double

by ourmaninthenorth   August 20, 2009  

OK, a question derviced from vanity and an apparent inability to find the right answer anywhere...

So, having had my nice bike built up with a triple a couple of years ago (for the Étape - I was grateful for it again this year), the rest of my riding I find I use only the 53 and 39.

Now, arguments aside as to whether its worth changing to a double (I've decided to if reasonably feasible), can anyone clarify for me whether a 10sp Ultegra Triple STI will shift properly on a double chainset?

I have assumed that I will need a double front mech, but is that necessary? If it means a new STI, then that's too much and I'll stick with the irritating chainline and disdain of real roadmen (and women).

I feel a bit of a dunce asking this question, but I've failed to find the answer anywhere else.

Help!

2 user comments

Oldest firstNewest firstBest rated

as ever with shimano gear, the answer is yes and no. No in that they'll say it won't work, yes in that it probably will, even if it's a bit of a bodge Smile

starting this year (ultegra 6700) there are specific shifters for double and triple chainsets and the spacing between the rings is different (about 1mm wider on the double). pre-6700 though the spacing is the same, so triple STIs should shift fine across a double.

Assuming you're going to run a standard double you may or may not be able to wind in the limit screws on your triple mech to stop the chain falling off either end. worth a try before you go and buy a new one...

I've used plenty of flat bar bikes that use a triple shifter to shift across a double, but i've never actually tried it with an STI lever, so i can't categorically say it'll work. anyone else done it?

Dave Atkinson's picture

posted by Dave Atkinson [7044 posts]
21st August 2009 - 10:21

like this
Like (0)

Thanks, Dave.

Yes, it's 6600 series, so I'm sure it will work as you suggest, and I note the point about using the mech.

Of course, I'll still have to source a short cage rear mech, though....

posted by ourmaninthenorth [93 posts]
23rd August 2009 - 17:48

like this
Like (0)