RichTheRoadie
06-02-2018, 10:24 PM
In Trek’s instructions for the front IsoSpeed on the Domane they say to tighten to 10Nm (I presume to compress the headset components down correctly) then back off and re-tighten to 4Nm.
I have done this, but it results in a knocking noise when braking or hitting lumps in the road. Tightening beyond 4Nm lessens the noise, but you’d need to go pretty tight to eliminate it - which I don’t want to do in case of invalidating the warranty etc.
It’s definitely not the headset knocking, but it is a similar sensation and noise. Looking at the setup of the system, it looks like it could be the top headset bearing moving in the IsoSpeed cup.
Anyone know a fix?
I have done this, but it results in a knocking noise when braking or hitting lumps in the road. Tightening beyond 4Nm lessens the noise, but you’d need to go pretty tight to eliminate it - which I don’t want to do in case of invalidating the warranty etc.
It’s definitely not the headset knocking, but it is a similar sensation and noise. Looking at the setup of the system, it looks like it could be the top headset bearing moving in the IsoSpeed cup.
Anyone know a fix?