jis one inch 1 inch threaded headset head set

Accessories	Bicycles	Parts	Specials	Tools

J.I.S. One Inch Threaded Headsets

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
30.0 mm	27.0 mm	1" x 24 tpi	7/8" / 22.2 mm

Tange MA-60 J.I.S. $12.95

A decent economy-grade headset.
Stack height: 31.2 mm
Weight: 160 grams

Excellent value in a steel headset, using 5/32" ball bearings.
Stack height: 33.4 mm Weight: 149 grams

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

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

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