Hi, Just bought a new bike with shimano tiagra gearing. However the gear shifters doesn't seem to work. There is no movement in the cables when I try to shift gears. Do you have any idea for a quick fix or do I need to take it back to the shop (2,5 h drive from here). Thanx
Cycling - Shimano - 24 Speed Road Racing Bike Bicycle Modell Rs888
Answers & Comments
You don't mention which shifter(s) malfunction or if you're even pedaling the bike while shifting (I make NO assumptions).
If you operate the inner shift lever (NOT the brake lever) on each side through several clicks that should RELAX any tension in the shifter cables. Then if you pick the bike up and pedal it forward a couple of turns the front shifter should drop the chain the the lowest chainring and the rear derailleur should shift out the the smallest cog.
With the bike suspended (say, hanging from a low tree branch by the tip of the seat) you should be able to turn the cranks and manually pull sideways on either exposed shifter cable where it runs down along the downtube then release it.
This should cycle each respective derailleur through its entire range. If the cables don't travel sufficiently in this manner, the shifters will never make them do it either.
Perhaps you could CALL the Bike Shop and they would talk you through a quick operational check.