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ISO One Inch Threaded Headsets

This is the size used on most high quality bicycles manufactured before the late 1990s. Sometimes referred to as "Campagnolo size." See also Sheldon Brown's Headset Crib Sheet ISOStandard Dimensions:
Cup outside diameter	Crown race inside diameter	Thread size	Stem diameter
30.2 mm	26.4	1" x 24 tpi	7/8" / 22.2 mm

New! Cane Creek Classic 100 $109.95  

Cane Creek pulled out all the stops when they made this stunning 1" threaded headset!

One cool feature of this headset is a washer with a small set screw that replaces the traditional keyed washer used in between the top nut and the locknut. The set screw can be adjusted to lock in to the slot on most threaded steerer tubes. 1.5mm allen wrench included.

Split-Lip sealed bearings are drop-in fit for easy servicing

AL-6066 is 35% stronger than AL-6061 typically used for headset cups

Fits 1" threaded steerer tubes.

Crown race: 26.4mm

Stack height: 39mm

Polished silver

Made in USA

New! Velo Orange Grand Cru HD1264 $40.95  

Very nice quality 1" threaded headset.

Over-sized sealed bearings

Alloy construction

The fork crown race is split so it slides on without tools

42mm stack height

26.4 (ISO) crown race

Ritchey Logic HD3202 $19.95  

Top: 1/8" balls
Bottom 3/16" balls.

Stack height: 33 mm Weight: 130 grams

Color: Black

Shimano 105 (5500) HD8456 $43.95

Cartridge bearing aluminium headset, unbeatable for the price!

Stack height: 37.5 mm

Weight: 110 grams

Tange MA-60 ISO $12.95

A decent economy-grade headset.

Stack height: 31.2 mm

Weight: 160 grams

Tange Levin ISO HD1001 $24.95

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

Stack height: 33.4 mm Weight: 149 grams

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

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