|For Threaded Forks/Headsets||For Threadless Forks/Headsets|
|1 Inch||1 1/8 Inch||1 1/4 Inch||1 Inch||1 1/8 Inch||1 1/4 Inch|
Stems listed in this section have standard 1" (25.4 mm) diameter quills, fit threaded steerers with outside diameter of 1 1/8" (28.6 mm)
This size is not very common, compared with 1 Inch threaded and 1 1/8 Inch threadless systems.
Note: Steerers are butted at the bottom, so the hole in the steerer is constant-diameter until near the bottom, then the walls taper inward in the butted section. It is vitally important that the stem extender (or stem) is not inserted so far that the wedge is installed where the steerer is narrowing, or it could come loose unpredictably. This is sometimes a problem on smaller frames if you try to insert the stem or a stem riser too far down into the steerer.
These beautifully made stainless-steel shims let you use a standard 25.4 mm (1 inch) diameter handlebar in an Italian size (26.0 mm) stem.
|Articles by Sheldon Brown and others|
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