| Accessories | Bicycles | Parts | Specials | Tools |
|---|
In West Newton Since 1952 - On The Web Since 1995
1 inch "BMX Size" Headsets
| BMX Standard Dimensions (Most bicycles with one-piece cranks, including most older U.S. made bikes) See also our page of Parts for American Bicycles | |||
|---|---|---|---|
| Cup outside diameter | Crown race inside diameter | Thread size | Stem diameter |
| 32.7 mm | 26.4 | 1" x 24 tpi | .833" / 21.15 mm |
Headsets from Quality Bicycle Products
Click on the link for your size:
| For Threaded Steerers | |||||
|---|---|---|---|---|---|
| 1 inch ISO | 1 inch J.I.S. | 1 inch B.M.X. | 1 1/8 inch Threaded | 1 1/4 inch Threaded | French thread |
| Road bikes older mtbs | Old Japanese size | BMX, Cruisers Old MTBs | Newer mtbs | Rare | Older French bicycles |
| For Threadless Steerers ("Aheadset," et. al.) | ||
|---|---|---|
| 1 inch Threadless | 1 1/8 inch Threadless | 1 1/4 inch Threadless |
| Some mtbs | Most Newer mtbs | Newer mtbs |
See also Sheldon Brown's Headset Crib Sheet
This site also features many
useful articles by Sheldon Brown
and others.
Feedback? Questions?
We also have a page of selected links