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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)
Monocrome 1 1/8" Headset
Shockcraft 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" ACB 6805 FC Stainless Steel Suspension & Headset Bearing (Enduro MAX)
US$39.71Available on backorder
Stainless Steel ACB (Angular Contact Bearing)
Learn More
36° internal chamfer. 45° external chamfer.
ID: 27.1 mm, OD: 38 mm, W: 6.5 mm
Enduro Part Code: ACB6805 SS -
1" ACB 6805 FC Suspension & Headset Bearing (Enduro MAX)
US$16.83Last One Left
Application: Niner Suspension Pivots & Trek Speed Concept Lower Headsets
ID: 27.1 mm, OD: 38 mm, W: 6.5 mm Learn More -
1.5" Crown Reducer Alloy (FSA)
US$17.02In Stock
Fits 1.125" steerer. Adapts to 1.5" headset.
Fits 3645 bearings with 36° inner chamfer
FSA Part Code: 160-5540 Learn More -
1.5" Crown Reducer Steel (FSA)
US$14.30In Stock
Fits 1.125" steerer. Adapts to 1.5" headset.
Fits 3645 bearings with 36° inner chamfer
FSA Part Code: 160-5538 Learn More -
1.5" Headset Lower Cup Assembly for 44 mm Head-tube Premium Version (FSA)
US$78.61Available on backorder
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 -
1.5" Headset Lower Cup Assembly for 44 mm Head-tube Standard Version (FSA)
US$65.85Last One Left
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 -
6807-2RS FC Headset Bearing (Enduro MAX)
US$15.11Available on backorder
Application: Headsets
ID: 35 mm, OD: 47 mm, W: 7 mm Learn More -
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
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ACB3645 1 1/8" Headset Bearing (Monocrome)
US$14.18In Stock
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 -
ACB3645 1 1/8" Headset Bearing for IS42 Headsets (Cane Creek)
US$21.27Available on backorder
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 -
ACB3645 1 1/8" Stainless Steel FC Headset Bearing (Enduro MAX)
US$35.39In Stock
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 -
ACB3645 1.5" Headset Bearing (Monocrome)
US$21.58In Stock
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 -
ACB3645 1.5" Stainless Steel Cane Creek Lower Headset Bearing (Enduro)
US$44.51Last One Left
ID: 40 mm, OD: 52 mm, W: 6.5 mm
Stainless Steel Learn More -
ACB3645 1.8" Headset Bearing (Monocrome)
US$24.05In Stock
Application: e-bike headsets, including Trek Rail
36 x 45 degree ACB
ID: 50 mm, OD: 61.9 mm, W: 8 mm Learn More -
ACB4545 1 1/4" Headset Bearing for Giant Overdrive 2 (Monocrome)
US$16.65In Stock
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ACB4545 1 1/8" Headset Bearing (Monocrome)
US$14.18In Stock
Application: 1 1/8" 4545 Headsets 45 x 45 degree ACB
41 mm OD, 30.1 mm ID, 6.5 mm W Learn More -
ACB4545 1 1/8" Stainless Steel Headset Bearing (Enduro)
US$40.57Available on backorder
Application: 1 1/8" 4545 Headsets 45 x 45 degree ACB
41 mm OD, 30.15 mm ID, 7 mm W Learn More -
Application: 1 3/8" Headsets (Specialized etc lower race)
Learn More
45 x 45 degree ACB
ID: 37 mm, OD: 49 mm, W: 7 mm
Stainless Steel
Enduro Part Code: ACB4545-1375-SS-SPEC -
ACB4545 1.5" Headset Bearing (Monocrome)
US$21.58In Stock
Application: 1.5" 4545 Headsets
Learn More
45 x 45 degree ACB
51.9 mm OD, 40mm ID
6.3mm across chamfers -
ACB4545 1.5" Stainless Steel Headset Bearing (Enduro)
US$53.15Last One Left
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 -
B542-2RS FC Headset Bearing (Enduro MAX)
US$23.92In Stock
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 -
B543-2RS FC Headset Bearing (Enduro MAX)
US$23.49Available on backorder
Application: Cannondale Lefty Headsets
ID: 1 9/16" (39.7 mm), OD: 2" (50.8 mm), W: 9/32"
Imperial bearing Learn More -
B543-2RS FC Stainless Steel Headset Bearing (Enduro MAX)
US$46.80Available on backorder
Application: Cannondale Lefty Headsets
ID: 1 9/16" (39.7 mm), OD: 2" (50.8 mm), W: 9/32"
Imperial bearing Learn More -
Campy 4545 1 1/8" 1RS Headset Bearing (Monocrome)
US$16.65In Stock
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 -
Campy 4545 1 1/8" 2RS Stainless Steel Headset Bearing (Enduro)
US$49.75In Stock
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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Shopping Options
- Bearing Internal Diameter (ID)
- Bearing Outside Diameter (OD)
- Bearing Material
- Bearing Chamfer
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