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Headset Bearings

Make your old headset work like new.  Shockcraft has replacement cartridge bearings to fit most common headsets and frames.

From Cane Creek compatible ACB3645 bearings to Campy compatible 4545 bearings and even replacement bearings for Cannondale's own 1.5 inch headset, Shockcraft has them all.  We have high quality chromium steel across the range with stainless steel available in some sizes.

These bearings also fit several non-headset applications, such as the pivots in GT's I-drive suspension bikes.  Contact us for help with sizing.

Headset Bearing Identification Chart (PDF)

Shockcraft Headset Bearing Identification Chart

Monocrome 1 1/8" Headset

Shockcraft 1 1/8" Headset - MCH18SShockcraft also has its own high quality headsets with cartridge bearings for standard 1 1/8" frames and forks.  Available with chromium steel or stainless steel bearings.

 

 

 

 

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  1. Stainless Steel ACB (Angular Contact Bearing)
    36° internal chamfer.  45° external chamfer.
    ID: 27.1 mm, OD: 38 mm, W: 6.5 mm

    Enduro Part Code:  ACB6805 SS

    Learn More
  2. Application: Niner Suspension Pivots & Trek Speed Concept Lower Headsets
    ID: 27.1 mm, OD: 38 mm, W: 6.5 mm Learn More
  3. 1.5" Crown Reducer Alloy (FSA)

    US$16.94

    In Stock

    Fits 1.125" steerer.  Adapts to 1.5" headset.
    Fits 3645 bearings with 36° inner chamfer

    FSA Part Code: 160-5540 Learn More
  4. 1.5" Crown Reducer Steel (FSA)

    US$14.24

    In Stock

    Fits 1.125" steerer.  Adapts to 1.5" headset.
    Fits 3645 bearings with 36° inner chamfer

    FSA Part Code: 160-5538 Learn More
  5. This headset cup can adapt Scott Roxter, Trek Roscoe, Avanti Montari and other bikes to take a tapered steerer fork like the Manitou JUnit.

    1.5" headset lower cup assembly to adapt a 44 mm head-tube to a 1.5" taper steerer (premium version with stainless steel bearings)
    Includes aluminium lower cup with 12 mm spigot, ACB3645 1.5" stainless steel cartridge bearing and 36 degree crown race
    Black version with chromium steel bearings also available here

    FSA Part Code:  101-0019000010 Learn More
  6. This headset cup can adapt Scott Roxter, Trek Roscoe, Avanti Montari and other bikes to take a tapered steerer fork like the Manitou JUnit.

    1.5" headset lower cup assembly to adapt a 44 mm head-tube to a 1.5" taper steerer
    Includes aluminium lower cup with 12 mm spigot, ACB3645 1.5" cartridge bearing and 36 degree crown race
    Premium version with stainless steel bearings also available here

    FSA Part Code:  101-1331 Learn More
  7. Application: Headsets
    ID: 35 mm, OD: 47 mm, W: 7 mm Learn More
  8. Application: 1.5" Lower headset bearing race and matching 4545 steel bearing. Replaces both 45 x 45 degree Campy style and 36 x 45 degree "ACB" headset lower races Learn More
  9. Application: 1 1/8" Headsets (Cane Creek, Woodman, FSA) & GT I-drive Suspension Pivots
    36 x 45 degree ACB
    ID: 30.1 mm, OD: 41 mm, W: 6.5 mm Learn More
  10. Application: Cane Creek IS42 Headsets
    36 x 45 degree ACB
    ID: 30 mm, OD: 41.8 mm, W: 6.3 mm
    Zinc coated steel Learn More
  11. Application: 1 1/8" Headsets (Cane Creek, Woodman, FSA) & GT I-drive Suspension Pivots
    36 x 45 degree ACB
    ID: 30.1 mm, OD: 41 mm, W: 6.5 mm Learn More
  12. Application: Lower race of 1.5" straight and tapered headsets
    36 x 45 degree ACB
    ID: 40 mm, OD: 52 mm, W: 7 mm Learn More
  13. ID: 40 mm, OD: 52 mm, W: 6.5 mm
    Stainless Steel Learn More
  14. Application: e-bike headsets, including Trek Rail
    36 x 45 degree ACB
    ID: 50 mm, OD: 61.9 mm, W: 8 mm Learn More
  15. Application: Giant Overdrive 2 (OD2) Headsets
    45 x 45 degree ACB
    41.8 mm OD Learn More
  16. Application: 1 1/8" 4545 Headsets 45 x 45 degree ACB
    41 mm OD, 30.1 mm ID, 6.5 mm W Learn More
  17. Application: 1 1/8" 4545 Headsets 45 x 45 degree ACB
    41 mm OD, 30.15 mm ID, 7 mm W Learn More
  18. Application: 1 3/8" Headsets (Specialized etc lower race)
    45 x 45 degree ACB
    ID: 37 mm, OD: 49 mm, W: 7 mm
    Stainless Steel

    Enduro Part Code:  ACB4545-1375-SS-SPEC

    Learn More
  19. Application: 1.5" 4545 Headsets
    45 x 45 degree ACB
    51.9 mm OD, 40mm ID
    6.3mm across chamfers

    Learn More
  20. Application: 1.5" 4545 Headsets
    45 x 45 degree ACB
    ID: 40 mm, OD: 52 mm, W: 7 mm
    7.0 mm across chamfers Learn More
  21. Application: Klein Headsets
    ID: 1 5/16" (33.34 mm), OD: 1 3/4" (44.45 mm), W: 9/32" (7.14 mm)
    Imperial bearing Learn More
  22. Application: Cannondale Lefty Headsets
    ID: 1 9/16" (39.7 mm), OD: 2" (50.8 mm), W: 9/32"
    Imperial bearing Learn More
  23. Application: Cannondale Lefty Headsets
    ID: 1 9/16" (39.7 mm), OD: 2" (50.8 mm), W: 9/32"
    Imperial bearing Learn More
  24. Application: 1 1/8" 4545 Headsets
    45 x 45 degree ACB
    ID: 30.5 mm, OD: 41.8 mm, W: 7.88 mm
    Features single rubber seal (1RS), rolled over outer race & recessed inner chamfer
    Exact replacement for Campy 4545 1 1/8" bearings Learn More
  25. Application: 1 1/8" 4545 Headsets using campagnolo (campy) style 45 x 45 degree ACB bearings ID: 30.5 mm, OD: 41.8 mm, W: 6.4 mm

    Two rubber seals (2RS) This bearing looks different but is a direct fit to replace the one-side-sealed Campy 4545 1 1/8" bearings

    Straight replacement for Campy 4545 1 1/8" bearings Learn More

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