|The J.I.S. (Japanese Industrial Standard) size was used on older Japanese and other Asian bikes, most commonly less expensive models. |
Later, higher-priced Asian bikes use the ISO size.
|Cup outside diameter||Crown race inside diameter||Thread size||Stem diameter|
(Current models are 30.2 mm)
|27.0 mm||1" x 24 tpi||7/8" / 22.2 mm|
|NOTE: The Tange headset is NOT "Full JIS". They have 30.2mm cups.|
We've sold hundreds of the Tange headsets over the years and have not heard of any problems when installing the 30.2mm cups into 30.0mm I.D. headtubes.
Excellent value in a steel headset, using 5/32" ball bearings.
Stack height: 33.4 mm
Weight: 149 grams
Crown Race: 27.0mm
|Articles by Sheldon Brown and others|
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