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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 diameterCrown race inside diameterThread sizeStem diameter
30.0 mm
(Current models are 30.2 mm)
27.0 mm 1" x 24 tpi7/8" / 22.2 mm
NOTE: Both Tange headsets are 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.
If you have any doubts, choose the Velo-Orange "Full JIS" headset.
VO JIS headset

Velo-Orange "Full JIS" HD1262 $27.95 buy button

A very nice aluminum/steel headset.

Stack height: 41.0 mm

Weight: 114 grams
Crown Race: 27.0mm
Cups: 30.0mm



Passage headset

Tange Passage HD1008 $13.95 buy button

A decent economy-grade headset.

Stack height: 30.0 mm

Weight: 114 grams
Crown Race: 27.0mm
Cups: 30.2mm

Levin headset

Tange Levin CDS HD1002 $24.95 buy button

Excellent value in a steel headset, using 5/32" ball bearings.

Stack height: 33.4 mm

Weight: 149 grams
Crown Race: 27.0mm
Cups: 30.2mm


spoke

Headsets from Quality Bicycle Products

spoke

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 mtbsRareOlder French
bicycles

For Threadless Steerers ("Aheadset," et. al.)
1 inch Threadless1 1/8 inch Threadless1 1/4 inch Threadless
Some mtbsMost
Newer mtbs
Newer mtbs

See also Sheldon Brown's Headset Crib Sheet

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