Setting up a Double Crankset on a Triple FD
#1
Senior Member
Thread Starter
Setting up a Double Crankset on a Triple FD
So I got a new double crankset and I'm having a hell of a time trying to get it to work with my triple FD. I have heard that it is possible, and most people have little problem with it. Right now I have it set up so that the limit screw blocks out where the granny gear would have been. It works, but shifting is harsh and far from perfect. Downshifts especially are rough. Any tips? Anyone have experience doing this? How did you get it to work?
#2
Senior Member
The triple FD should work same as the double. Don't worry about guestimating where the granny gear would be. Try disconnecting the cable then reset the low limit screw so that there is a two millimeter gap between chain and the inside of the derailleur cage. Then reattached the cable and adjust tension as needed with barrel adjuster. Should work.
#3
Senior Member
Thread Starter
The triple FD should work same as the double. Don't worry about guestimating where the granny gear would be. Try disconnecting the cable then reset the low limit screw so that there is a two millimeter gap between chain and the inside of the derailleur cage. Then reattached the cable and adjust tension as needed with barrel adjuster. Should work.
#4
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For any problems with a FD, I recommend:
__________________________________________________________________________________-
Take the cable off the FD. Now install it from scratch as per Park Tool Repair:
https://www.parktool.com/repair/readhowto.asp?id=75
And BicycleTutor:
https://bicycletutor.com/adjust-front-derailer/
When you have it properly trimmed and are ready for the cable - a new one wouldn't hurt - you want to pull the cable taut - not too tight, taut. Then apply 48 to 60 inch-pounds to the pinch-bolt. Then put it through it's paces.
It's always easier and faster to install a FD from square-one, than it is to make adjustments with it already attached. This tends to fix one thing - while throwing another out of kilter. Start fresh. You'll get it.
Adding a barrel-adjuster can solve many problems with the cable coming loose - or being too tight.
__________________________________________________________________________________-
Take the cable off the FD. Now install it from scratch as per Park Tool Repair:
https://www.parktool.com/repair/readhowto.asp?id=75
And BicycleTutor:
https://bicycletutor.com/adjust-front-derailer/
When you have it properly trimmed and are ready for the cable - a new one wouldn't hurt - you want to pull the cable taut - not too tight, taut. Then apply 48 to 60 inch-pounds to the pinch-bolt. Then put it through it's paces.
It's always easier and faster to install a FD from square-one, than it is to make adjustments with it already attached. This tends to fix one thing - while throwing another out of kilter. Start fresh. You'll get it.
Adding a barrel-adjuster can solve many problems with the cable coming loose - or being too tight.
#5
Senior Member
By the way, when you swapped cranks, did you change the BB to one with a spindle length compatible with new cranks? If you are still using the BB that came with triple crankset, with the double, your chainline will be off, which also could affect shifting.
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