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ISO One Inch Threaded Headsets

This is the size used on most high quality bicycles manufactured before the late 1990s. See also Sheldon Brown's Headset Crib Sheet

ISO Standard Dimensions:

Cup outside diameterCrown race inside diameterThread sizeStem diameter
30.2 mm 26.4 1" x 24 tpi7/8" / 22.2 mm

 

Cane Creek Classic 110 HD2364 $139.95 buy button 

HD2364
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


  • Shimano 105

    Shimano 105 HP-5500 HD8456 $54.95 buy button 

    NOS!

    Shimano's 105 Headset ensures smooth steering. It utilizes beefy cartridge bearings and anodized-aluminum cups to create a headset that's durable, light and affordable.

  • Color: Silver
  • Crown Race: 26.4mm
  • Stack Height: 37.5 mm
  • Weight: 106.0 g


  • Grand Cru

    Velo Orange Grand Cru HD1264 $44.95 buy button 

    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


  •   HD1280

    New! Origin8 Pro HD1280 $29.95 buy button 

    Excellent value in an alloy headset with sealed cartridge bearings.

    CNC machined 6061-T6 aluminum alloy cups. Silver.

    Comes with both 26.4mm and 27.0mm crown races.

  • Cup Diameter: 30.2mm
  • Stack Height: 42.5mm
  • Weight: 110 grams



  •  

    HD1001

    Tange Levin ISO HD1001 $24.95 buy button

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

    Stack height: 33.4 mm Weight: 149 grams






    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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