I installed a triple and a new Tiagra FD. The problem that I have is that it is very difficult to up shift from the STI lever. Especially from the medium to the big ring: which is the end of the range. The entire drive train is new and Iíve rechecked and relubed everything.
Iíve tested the spring action of the FD and found it to be heavy compared to several others including another 9 sp Tiagra. The two models look a bit different, with the problem unit being newer.
FWIW, the problem unit exceeds the capacity of a 15# scale when moving from middle to big ring. Other, older FDs measure 8-11 # in that area.
My questions are:
Is there any way to adjust the return spring? There is no obvious way to disassemble the unit because it seems to be assembled with swaged pins.
Is this the norm for new Tiagras? A new unit is pretty inexpensive, but I donít want to buy another problem.
Any help will be appreciated.