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Headset bearings won't go into cup

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Headset bearings won't go into cup

Old 02-01-15, 01:33 AM
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Headset bearings won't go into cup

Building up a new bike. It's a CF fatty with an internal headset. The Cane Creek 40 supplied with the bike won't fit into the cups. They're sealed bearings that just will not go in without some pretty significant force.

I've heard of freezing the cartridges, but what about lightly sanding the inside of the head tube with fine grit (say, 600) sand paper? I've used grease and I can't tell if it's just rough or if some needs to come off, but the bearing cartridges will just not go in.

Suggestions on how to get them installed? Thanks in advance!

Last edited by skiahh; 02-01-15 at 01:47 AM.
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Old 02-01-15, 01:58 AM
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it may be worth your time to double check with the manufacturer or salesperson as to the proper headset. maybe check some website that sell that bike. it won't have been the first time someone packed the wrong item off a packing list.

googling "CF fatty" brings up topics on Cystic Fibrosis. CF may be carbon fiber, or cute female, or clyde fescue the turf salesman, IDK. give me something to work with here. pics help.

if you can grease the bearing, put your palm on it and press hard, pound moderately and it won't seat you may have a problem. depending on the material of the frame 600 grit may or may not help.

Last edited by hueyhoolihan; 02-01-15 at 02:25 AM.
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Old 02-01-15, 07:54 AM
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Originally Posted by skiahh View Post

I've heard of freezing the cartridges, ....!
OK, you'll need a large bowl, and plenty of ice. Now invite some friends over, put popcorn in the bowl, and pour drinks over the ice and watch the game like everybody else.

You haven't given me nearly enough information for a reasonable answer as to how to go forward. But it's a new frame, and before doing anything that you may regret later, call the maker and ask how much force, if any, should be needed to install the headset. Then follow their advice.
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