Threads

ebay question...

are ITALIAN threads and ENGLISH/BRITISH threads on headsets and the like

the same thing...?

Not sure, but I think the threading is the same but the angle varies.

can I buy an Italian headset for an English fork...?

ask dicki, he was in a similar situation a few weeks ago.

Sheldon says:

Italian headset threads are the same as British/ISO, except for the thread angle difference. They may be interchanged, but you should not go back-and-forth bewteen Italian and British/ISO headsets.

Rattlebag Sheldon says:

Italian headset threads are the same as British/ISO, except for the thread angle difference. They may be interchanged, but you should not go back-and-forth bewteen Italian and British/ISO headsets.

The thing about Sheldon is he is a LOON and I never understand anything he says, here he says yes they are the same except that they are not, er help anyone

two main types iso / english and italian plus a variety of oddities plus a variety of tpi ( threads per inch ) for each quite a few combinations but most are

British thread, 1" x 24 TPI 26.4

forgive me if this is wrong but sheldons site is quite useful all the numbers and column headers are on his site so the below will make more sense

1" ISO Standard
(25.4 mm) 7/8"(22.2 mm) 26.4 mm 30.2 mm 24 This is the standard 1" size.

see

http://www.sheldonbrown.com/gloss_ha-i.html#headset

under h for headset

there was atable showing what would fit with what usually mixing the types doesn't work

The Italian and the British is the same diameters, near enough, but the threads are cut at a different angles, now if I have a nut and a bolt and the nut is threaded at a different angle to the bolt then it ain't going to work, it will go on wonky or it will strip the threads. However their are people on e-bay saying that Italian and British headsets are interchangable ....? maybe its me but I never understand a word of what that Sheldon rambles on about .

Anyone actually got an Italian headset on a British bike.

they will end up working loose i believe they might feel fine when you are tightening up the headset but very quickly the different diameteres tpi's etc will unmesh

thanks dicki ...:)

Perhaps that's what was happening last night to damnham? One loose headset.

My Campag headset on Colnago forks is always feckin' loose!! I'm gonna ride it until I need to bin it stupid fuggin thing.. then buy a Langster :)

yeah, integrated headset is they way forward ;)

velocity boy Perhaps that's what was happening last night to damnham? One loose headset.

Think it's more to do with the fact i'm just to lazy to tighten it down properly