I've been searching the forum for a similar topic, but it seems like everyone has problem with the brakes, but not the levers.
I have drop bars with Tektro aero brake levers (r100) and tektro inline brake levers. When I activate the aero brake lever connected to the front brake, or the inline lever connected to the front brake, both levers make a squeaking noise. Any ideas on why it's happening?
too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
There might be a bit of misalignment of the cable running through the inline. I doubt it's at the main lever since the inline wouldn't work backward and make it squeak. Take a close look at the area near the inline lever or hold it as you work the main lever, and you might see or feel what's happening.
The solution might be as simple as putting a drop of oil where the wire runs through the inline lever (both the lever and body), or you might need to run some down the cable.
If the bike is new, let it be the dealers problem.