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1 inch or 1.125 inch stearer - How to measure?(7 posts)

1 inch or 1.125 inch stearer - How to measure?Chainstay
Jul 1, 2003 7:52 PM
Is this measured on the locknut ID? My Dura Ace 7401 measures 7/8" ???
re: 1 inch or 1.125 inch stearer - How to measure?russw19
Jul 1, 2003 8:21 PM
I think it is the inner diameter of the frame's headtube, but if you have a Dura-Ace headset, it's a 1 inch. That's all they ever made them in.

Russ
NO!C-40
Jul 2, 2003 4:59 AM
The 1" or 1-1/8" dimension is the outside diameter of the steering tube.

A threaded road bike headset would certainly be a 1 inch.
"One inch" isn't really an inchcory
Jul 2, 2003 7:59 AM
At least on quill stems, what everybody calls "one inch" actually measures 22.2mm in diameter (an inch is 25.4). That's what you're measuring at 7/8 inch, I imagine.
I have no idea why we call it one-inch.
one inch is one inch...C-40
Jul 2, 2003 8:21 AM
The outside diameter of all threaded steering tubes on road bikes is 1 inch.

The ID of the steering tube is 7/8 inch or 22.2mm.
more info...C-40
Jul 2, 2003 8:32 AM
http://www.sheldonbrown.com/gloss_h.html#headset
Buy a 1" stem, if it is too small, you have a 1.125 stearer NMMarketing Dept
Jul 2, 2003 9:08 AM