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HEADSET wich Diameter. 33.6 mm?

PatttanPatttan Posts: 2
edited May 2007 in Workshop
Hi, I don't know wich HEADSET to bay for my new (Aluminiun frame 1 1/8")
The inner diameter on the headset tube is 33.6mm.
It do not mach with 1 1/8"(28.575mm).
It's look more like 1 1/3"(33.782mm) But if this exist do not fit into my 33.6mm. It doesn't make sense.
I didn't see any size like this before.
I'm realy confused and I don't know wich Headset to by.
I'll realy apreciate any info about this matter.
Thanks very much.


  • Will1985Will1985 Posts: 289
    It's a standard 1 1/8" headtube diameter. They are considerably larger I believe to accommodate the larger races of the headset.
  • monty_dogcpmonty_dogcp Posts: 379
    I presume you're talking about an integrated headset - i.e. there are no seperate cups, but the bearings fit into machined recesses in the top and bottom of the headtube? Just to confuse you, there are two or three different patterns - i.e. same bearing diameters, but different bearing angles. Best to make a visit to your LBS to find out what type you need rather than trying to buy something online without knowing the precise type you need. Worth looking at the FSA website for example which details the different types.
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