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| 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 | ||
Top: 1/8" balls
Bottom 3/16" balls.Stack height: 33 mm
Weight: 130 grams
Color: Black
Cartridge bearing aluminium headset.Stack height: 37.5 mm
Weight: 108 grams
Cartridge bearing aluminium headset, unbeatable for the price!Stack height: 37.5 mm
Weight: 110 grams
Cartridge bearing steel headset, unbeatable for the price!Stack height: 37.5 mm
Weight: 166 grams
One of the lightest, most durable headsets available. The A-9 headset uses needle bearings, which have a much larger contact area than the ball bearings used in most headsets, and never develop "indexed steering." They don't turn quite as freely as ball-bearing headsets.Stack height: 40.2 mm
Weight: 86 grams
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 |
| Accessories | Bicycles | Parts | Specials | Tools |
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