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Buy a fork with 1" or 1-1/8" steerer?(6 posts)

Buy a fork with 1" or 1-1/8" steerer?Dennis N
Jan 29, 2003 11:18 PM
Hi All!

I ride a Trek 1200 (year 2000) road bike and would like to upgrade to carbon fork. Problem is I don't know what size is my headtube...

I realized my orginal fork is threaded and uses 1" steerer. But I am not 100% sure if I should get a carbon fork with 1" steerer.

(Reason is because the year 2002 model of Trek 1200 uses 1" steerer as well but it uses a 1" to 1-1/8" head tube adapter. So its headtube is actually 1-1/8")

Anyone wanna voice their suggestion?
Thanks in advance!
re: Buy a fork with 1" or 1-1/8" steerer?seyboro
Jan 30, 2003 3:21 AM
If it fits your bike, I suggest, you choose a 1-1/8. Since it is the most widely used industry standard these days, you will find the best selection there.
As for a 1" fork with a carbon steerer, they are relatively rare. If you are a big guy, some models might feel a little too flexy to you as well.
I have found it useful to narrow down my final choices to 2 or 3 and then consult the review section on this site for additional input.
re: Buy a fork with 1" or 1-1/8" steerer?KeeponTrekkin
Jan 30, 2003 6:08 AM
(Reason is because the year 2002 model of Trek 1200 uses 1" steerer as well but it uses a 1" to 1-1/8" head tube adapter.

I suspect the reason for the adaptor is to adapt to the stem, almost all of which are 1 1/8".

That's another reason to get 1 1/8" if you can, you won't need the adaptor (a thin collar to allow the 1 1/8" stem to grip the 1" steerer tube; some stem makers charge extra for the adaptor, others include it with each stem).

I don't think there's a practical difference for most road use between 1 and 1 1/8" steerers (and I have 1" with an adaptor which has the stem maker's logo beautifully laser etched where it can only be appreciated prior to and during assembly and I paid $5 for the privilege). However, as the first responding poster says, there's a lot more choice if you want 1 1/8.

That's where the confsion starts...seyboro
Jan 30, 2003 6:44 AM
I read original question to imply that the poster's bike has a 1" steerer in a 1" head tube. Then, the comment on the newer bike, I thought, referred to a 1" steerer in a 1-1/8" headtube, which would require a headset adapter. Neither one needs a shim to fit a 1" stem, however. I'm confused...
Anyways, get a 1-1/8 fork if it fits.
re: cutting though the fog.......Rusty Coggs
Jan 30, 2003 5:34 PM
The 2000 Trek 1200 uses a 1" steerer ,headtube and headset.It's also threaded. You have to stick with a 1" steerer.Maybe hard to find a 1" threaded cf. Threadless requires a new HS and stem too.Whether you want a 1" CF steerer is another issue,but it will be thredless. the steerer on the 2002 Trek 1200 is threadless cromo,but it is 1" .The HS on the 2002 1200 apparently adapts a 11/8" HT to a 1" steerer.
re: cutting though the fog.......Dennis N
Jan 31, 2003 4:30 PM
Thx Rusty!

Man, you sure save me from making a costly mistake! 1" threadless CF here I come!

For the other folks, sorry for the confusion and thx for the advice (next time I get a frame, I will make sure the headset uses 1 1/8" headtube.)