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Headset Install Troubles(7 posts)

Headset Install TroublesCraigVM
Mar 5, 2002 2:17 AM
I recently purchased a 2000 Schwinn SuperSport which came with some very heavy and ugly chrome threaded forks. I decided to replace them with a threadless setup and carbon forks. After much reading here on removing headsets, I did so with little trouble. When it came time to install the new FSA 1" Threadless Headset, I found they would not begin to fit. I am guessing they are close to 1 mm larger than the threaded headset I removed. I can easily insert and tap the originals back in but the new headset will not begine to get started. I don't want to try the "bigger hammer" technique and am wondering if I need to take it to a LBS incase they have special tools that can muscle these in without damaging the new headset. Is this unusual as I assumed all headsets come in 1" or 1 1/8 to exact tolerences
re: Headset Install TroublesPaul
Mar 5, 2002 4:35 AM
Craig,
Go to Parktool.com. I did my own head set using a Cane Creek C2. I had the headset tool, and after putting some grease on the cups, it pressed in with no problem. It has to be slightly larger or it won't press in correctly. I didn't measure it, but 1 mm sounds like that's what it should be in order for a tight fit. You didn't mention how you were doing it (what tool).

Paul
No! Interference should be closer to 0.1mm. (nm)mja
Mar 5, 2002 5:07 AM
ghjkl
Park tool says .1mm to .25mm, so 1mm is too large (nm)Paul
Mar 5, 2002 5:23 AM
When is an inch not an inch?Spoke Wrench
Mar 5, 2002 6:22 AM
Actually, there are several differences in 1" headsets. They ultimately have to do with the quality of the tubing that the bike frame and fork are made with.

What you need is a headset with 30.0mm cups. All of the better quality bikes take 30.2mm cups. I don't think your upgrade is going to work.
Get a caliper, if possibleCalvin Jones-Park Tool
Mar 5, 2002 6:45 AM
If you can, use a caliper to measure the ID of the frame and compare it to the OD of the cups. It is possible the Schwinn was a JIS standard (ID about 29.8mm), and your new FSA is the "Euro" standard cup of 30.2. Without numbers, however, it is difficult to say what is happening.

For more on threadless headsets and standards, see http://www.parktool.com/repair_help/howfix_headset.shtml
re: Headset Install TroublesCraigVM
Mar 5, 2002 12:49 PM
Thanks for the input. I looked at the old Performance Catalog and saw what the Park headset press looked like. I didn't want to spend $110+ for such a tool so put together one with $10 in parts from the local home improvement store. It took some tork but they slid inplace with no damage.