I have a fork that came off of a Trek Emonda that i am trying to use on a frame with a 44mm head tube. The fork is tapered with an integrated crown race (36 degrees, as far as I have been able to find). I am trying to make this fork work with a Cane Creek 110 EC44 lower. The bearing appears to fit correctly, however when the bearing is in the cup, the bottom of the cup rubs on the fork crown.

Does anyone have any advice on how I can get this fork to work with a 44mm compatible headset? Thanks.

in a pinch, i'd take some material off the cup with a lathe... or grind it on the flat side of a large bench grinder wheel, since i sold my lathe 20 years ago...

Since you did not say, I'm clueless on what the ID of the frame head tube is it fits into ..

and IDK if you have access to creating a machined spacer to raise the crown race seat, under that
to clear the crown race seat on the fork ..


So... buy an Trek Emonda, you already have a spare fork...





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I believe I stated it was a 44mm head tube designed for an external cup headset.

I'm not sure I follow what you're suggesting here. Could you explain. Thanks.

I think your only options are to remove some material from the bottom of the cup(not something I'd do to such an expensive headset) or try another lower headset to find one that doesn't rub. Maybe get a 40 series lower and shorten it, since they are not nearly as expensive.

that's gonna be one difficult to machine spacer, Bob... note that angled seat on the fork crown, buddy??? yah... not just a plain shim, jim... she'd be a tricky one!

That champher is why i and others didn't suggest a shim.

My father , RIP, was a career Machinist... I'm not, but I saw his creativity.. (after his retirement, ....he worked in naval war ship making)



Consider; get another fork , that wont work, yet?

it was made for an integrated head set design, get the frame , Emonda, Or get another Fork.





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