finding a 1" integrated angular contact aheadset?

yanto

My winter road bike forks are dead. I've managed to find some forks but am now struggling to find a IS aheadset - any ideas? My bike is probably about 2001 so its integrated and every aheadset I've seen does not look like it. the park tools website allowed me to correctly id it as an IS system but a web search is not providing any answers? Help?

rafletcher

Very doubtful that anyone still makes 1" IS headsets

g00se

Just wondering if you're sure it's an IS 1" and not a Campag Hiddenset 1" - they look fairly similar without measuring. There are a few going for £30.

http://www.highonbikes.com/campagnolo-record-1-hiddenset-threadless-headset.html

http://www.sprockets.uk.com/campagnolo-record-hiddenset-1%E2%80%9D-headset-p-2685.html

http://www.youtube.com/watch?v=xHS3XxnRqew

yanto

The current headset is a FSA jobby and does look similar to the campag one - except for the bottom part which does not look the same i.e. the fork just has a race on it and the cup is inside the frame? Or does the bottom part of the campag go inside the frame?
ta for help

g00se

My understanding is that the bottom part of the campag headset goes in the frame too. I'ts just in that video they show the open bearing being assembled on the race before the blue headtube is brought down over it.

Just googled it and it looks like FSA did make a campag compatible headset but other's that aren't. If the bearings do fit, you'll probably have to use the campag crown race though and not the one that's on there already.

Is there any FSA serial numbers on the old headset or bearings?

yanto

only marking other than FSA and US patent are 45 x 45 ACB. ta for your help very useful

rafletcher

45 x 45 is the campasg standard for integrsted headset - it's the angle of the seats top and bottom inside the headtube. FSA, Cane Creek and Ritchey all make 45 x 45 integrted headsets of varying stack heights. BUT I'm still not certain you'll get 1" versions.

Have a look here....

http://www.parktool.com/blog/repair-hel ... -standards

g00se

From what I can google, if it's 45/45, then it's a good change to be campag compatible - as FSA IS seem to be 36/45 (the 36 refers to the bearing's internal cangle - 45 to the external contact angle).

Another thing to consider - just remembered this - is if the fork is ISO (Euro) or JIS (Japanese) standard. The thicker band at the bottom (where the crown race wedges against) has a different diameter on a 1" steerer depending on the standard. the crown race will have to match that. Hopefully, your new fork will have this diameter marked on it.

JIS is 26.4mm and ISO is 27mm

(incedentally, if you were using non-integrated external cups for the bearings, then the inside of the head-tube would be of different diameter too - but this is irrelevent with internal bearing races).

I think you probably need to get hold of some decent vernier calipers to measure this crown race diameter (of both the old and new forks) and the diamter of the bearing races in the head tube.

With that and the fact that it's 45/45 bearings, we should be able to sort out what's needed.

g00se

rafletcher wrote:

45 x 45 is the campasg standard for integrsted headset - it's the angle of the seats top and bottom inside the headtube. FSA, Cane Creek and Ritchey all make 45 x 45 integrted headsets of varying stack heights. BUT I'm still not certain you'll get 1" versions.

Have a look here....

http://www.parktool.com/blog/repair-hel ... -standards

45/45 for campag and 36/45 for IS seems the standard for 1 1/8 steerers but I haven't seen anything definitive for the old 1" models.

You can certainly get campag 1" hiddensets for £30 (see above). It is looking more and more like the 1" campag record hiddenset will fit this setup.

It's also worth making sure the new 1" forks have an ISO crown race diameter.

g00se

Ah - from that park tools spec:

IS38: Integrated-angular contact - 1-inch steering column - 36 x 36 degree contact

So if 1" IS was 36/36, then the 1" 45/45 can only be campag.

yanto

ta guys - what you're saying is making me feel better by the minute!