Bicycle Mechanics - Triple to Double Crankset what I need to know

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nismosr
10-17-07, 12:23 PM
Hi,

My brother's bike a 9 speed Triple Chainring with 105 shifter and FD. If we change the crankset to Double - Do I need to replace the shifter and the FD ? Thank you

Al1943
10-17-07, 01:21 PM
No, 105 shifters work either way, double or triple.
nismosr
10-17-07, 01:34 PM
OK . I guess FD Crank and BB and RD also since it's a lon cage ?

Al1943
10-17-07, 01:40 PM
From triple to double you don't have to change the derailleurs, that's up to you.
nismosr
10-17-07, 01:53 PM
I could still use both derailleurs and just change the Crank and BB ?
Little Darwin
10-17-07, 02:12 PM
Depending on your objective:

You could just remove the inner ring and change the BB to a slightly shorter spindle.

Or just take off the inner ring and set the low limit screw on the FD.

Or, just pretend the inner ring isn't there.

So yeah... The derailleurs and shifters will work fine.
nismosr
10-18-07, 08:20 AM
Thank You!