General Cycling Discussion - What are cups?

Bikeforums.net is a forum about nothing but bikes. Our community can help you find information about hard-to-find and localized information like bicycle tours, specialties like where in your area to have your recumbent bike serviced, or what are the best bicycle tires and seats for the activities you use your bike for.



PDA

View Full Version : What are cups?

PriO
06-29-04, 11:40 PM
Im trying to figure out what this person means by cup is cracked.

" Needs new headset, cups are cracked."

I know what the headset is but cups?

Thanks in advance

khuon
06-29-04, 11:53 PM
http://www.parktool.com/images/repair_help/headtype09.jpg
SanDiegoSteve
06-30-04, 09:45 AM
Im trying to figure out what this person means by cup is cracked.

" Needs new headset, cups are cracked."

I know what the headset is but cups?

Thanks in advance

It is that nice smooth area where the bearing rolls/sits making the rotation smoth. The bearing surface.

Cracked = bad.

You probably can't tighten your headset enough to get rid of any play. Turning will also suffer and feel gritty.

PriO
06-30-04, 09:53 AM
But I can replace them right?
its not part of the frame is it?

http://i13.ebayimg.com/02/i/02/0a/fe/02_12_s.JPG

is it the one with the black markings all over it that looks like chinese characters?
demoncyclist
06-30-04, 10:12 AM
No, it is the piece that is pressed into the frame underneath that piece. There is another one at the bottom end of the head tube too. I had the same POS Miche headset on my Bianchi. I replaced it with a Shimano Ultegra unit, and it has been fine ever since.
MichaelW
06-30-04, 12:17 PM
The cut-away section above shows a cartridge bearing system, not your traditional cup and cone one, (moving surfaces are all contained within the replaceable cartridge).

Check out your type of headset at
http://www.parktool.com/repair_help/howfix_headset.shtml
In headset terminology, the cup and the cone surfaces are both called races.

Its a standard job for a decent bike shop to replace all the parts of a headset. You need some special tools, so its not really a home repair.