City Guy

Greetings

I'm in process of diagnosing a clunking sound coming from my 2017 Domane Iso Speed headset. I have downloaded the Trek manual for this and I can't seem to figure out how to verify the 10 Nm torque spec for the compression plug. I have removed the top cap, and can see the compression plug, but can't determine how to tighten or loosen, much lees verify the torque value. There is the threaded section which the top cap bolts threads into, but no internal hex fitting (or any other means to tighten/loosen) for tightening or loosening. I can insert a variety of tools through the compression plug's threaded section without encountering any fitting that would allow tighten or loosen. Definitely not the type of compression plug I have encountered in the past. I'm sure I'm missing something, so if anyone is familiar with this compression plug component and how to verify the torque setting, tighten and or loosen, please share. Thanks in advance.

RocThrower

I'm almost certain that that you should be able to use an allen wrench/hex bit in the threads where the top cap screws in. Maybe a 5 or 6 MM? I can check on my Domane with the front Isospeed tonight. I remember finding this diagram and using my torque wrench, but I don't think I went all the way to 10 nm.

alcjphil

In order to further tighten your compression top cap you first have to loosen the pinch bolts of your stem. Until you do that you cannot increase preload on your headset

RocThrower

I confirmed that the compression plug uses a 6mm hex. It's hard to tell from this pic, but it does fit (after you remove the top cap)

City Guy

Greetings

ok now I see it, thanks so much
im going to work on this during the upcoming weekend

thanks again. Take care