Bicycle Mechanics - Upgrading from a double to a triple crank

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gholt
07-31-08, 10:42 AM
I broke my brifter so, I upgraded to a 105 ST-5500 and it is triple compatable. So, I was wondering what would it take to make the front a triple. From what I can tell I might need to change the following:

Cranks
BB?
Front Derailurer
Rear Derailurer?

Is there anything else that would need to be changed. Our would the cost be halfway to a new bike?

Currently I have the following:

Ultegra derailurers
Ultegra Cranks
Ultegra Hubs
105 brakes
Tiagra brifters.

Any help would be appreciated.


Al1943
07-31-08, 01:51 PM
Triple crankset with compatible triple bottom bracket, both derailleurs.

Al