Headset on Custom Frame Build Urgent!

cd03wba

OK... I feel like a complete idiot...

I bought a custom frame and individual parts about 9 months ago and have only just gone on to fit all the parts... immediately before a major expedition... and it turns out that despite decades of experience I've gone and mucked up my choice of headset.

I have the following;
A straight 44mm Headtube. 44mm at the top and 44mm at the bottom

A tapered steerer tube
1.5 inches at the bottom
1 1/8th inches at the top

Can anyone tell me a model I should get, please?

I'm stuck abroad (Japan) don't speak any Japanese and need the headset, like yesterday.

I had bought a Chris King Inset 5 which although is the correct sort of headset, (in terms of straight headtube and tapered steerer) is for a straight 49.61mm Headtube.

I've checked on the internet but as ever the choice is bewildering, it needs to be sent asap and I cannot make another mistake timewise.

whyamihere

You need an external lower cup for a 44mm headtube and an internal upper cup. These should be labelled EC44 for the lower and ZS44 for the upper (ZS for zero stack). Make sure the lower cup is for a 1.5" steerer and you're good to go.

cd03wba

Great! You're a lifesaver!

I'll get researching and see if I can get one sent here.

cd03wba

Is this OK?

whyamihere

That looks like it should work.

sutiee

The B5 option from the link below would also fit, it's the bottom external cup, you still need the top internal cup. Have a look at the picture that shows the combinations of the different headsets to give you an idea of what's going on.

https://www.wiggle.co.uk/nukeproof-neutron-bottom-headset-cup

I think Type H from the link below would be another option for the bottom external cup
https://www.wiggle.co.uk/hope-pick-and-mix-headset