Flared headtube

[hopper22]

Hi

I've just built up an orange c16 r, and unfortunately I've discovered the head tube is flared, is there any known way to fix this, I've read a steel long cup Chris king headset can hel but a new one of them would cost more then the whole build, and I can't really justify that.

Thanks
Andy.

 

[marc two tone]

hi.

i don't have a fancy engineering style answer but, how flared? a little baggy or rattling around big-style?

on occasion, i have tried different cups from stock, to get a good fit, then just play around with races/bearings/cups til i get it up and running.

i know what you mean though. some cups need pressing( lump hammering) in, some just sit slack and others are just right with a tap from your spanner handle.

only suggestion i have right now.

good luck!

 

[legrandefromage]

Thats exactly what happened to mine and in the end I sold it on cheap. There was no reinforcement rings on the head tubes.

 

[ishaw]

I think FSA do a headset with a longer insert, cheaper than a king for sure. I had a similar issue with a frame, but not as bad by the sounds of it. Cup slipped in by hand but was a snug fit without any movement. You can get something machined to fit over the outside of the head tube to reinforce it (as well as to reduce the flair), and is a fix also used on cracked head tubes. Might be worth investigating?

 

[one-eyed_jim]

1" steerer?

Double-check it's not a JIS/ISO problem. JIS cups will sit loose in an ISO frame:

http://sheldonbrown.com/cribsheet-headsets.html

 

[hopper22]

Thanks for all the advice, it's a 1 inch head tube, and very loose, it won't stay in with out holding it in, I might get a reinforcement ring made up at work and give that a go, also I'll have a look at the fsa headset, how do I find out if it's a jis/ISP issue?

Thanks

 

[one-eyed_jim]

how do I find out if it's a jis/ISO issue?

You need to measure the cups you have, and ideally the head tube as well. A good Vernier caliper is accurate enough.

JIS cups measure 30.0mm while ISO cups are 30.2mm. That's enough difference to give the looseness you're observing, assuming the head tube is ISO. A JIS crown race is also 27.0mm vs 26.4mm for ISO, but it's not unknown for JIS cups to come with an ISO crown race, or vice versa.

If you have access to another headset you're sure is ISO, try that for size first.

 

[hopper22]

Thanks I'll give that a go

 

[gtRTSdh]

is it loose top & bottom? That will surely tell you if it's a 'standard' compatability issue.

 

[hopper22]

Both top and bottom are loose.