I've bought a new frame being this one: https://www.bike-discount.de/en/buy/cube-axial-wls-pro-frame-black-n-green-643919

Headtube diameter: Tapered 1 1/8" - 1 1/4" semi-integrated ZS44 - full-intgrated IS47 (Cube Headset FSA Orbit Z-t Eco #10359)

I already have a fork from another bike which is 1 1/8" to 1 1/2"

I wonder how can I mount this fork on the frame, since the fork is larger than the bottom part of the frame, I think that something like this could do, but I'm unsure:

enter image description here Hope brand - Lower Cup Semi Integrated 1 1/2" black

If that's not going to fit, which options do I have?

Thanks, any help is appreciated!

  • I have exactly your problem although I didn't order the bike parts yet. I can find adapters for 1 1/8 steerer tubes on 1 1/2 forks but nothing for 1 1/4 steerer tubes on 1 1/2 forks... Did you manage to fix the problem in the meantime? I have a 6700 groupset laying around and with a cheap frame and wheels I think it would make a nice wet weather-crossing bike. Please let me know if and how you fixed it!
    – user223515
    Sep 17, 2019 at 9:01

1 Answer 1


While there are options for mounting a smaller fork in a larger headtube, they're rare, weird and expensive.

For the opposite - The only way to mount a larger fork steerer in a smaller head tube is swap frame or fork, or replace the steerer on the fork. Either will have costs.

Sounds like you need to find a fork that will fit your frame. Sorry.

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