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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 1/8" ACB 870E 4545 Headset Bearing 41.8 mm OD (FSA)
US$18.23No Longer Available
Alternative bearing option: Campy 4545 1 1/8" 1RS Headset Bearing (Monocrome)
Headset bearing by FSA
45 x 45 degree ACB
MR121
ID: 30.5 mm, OD: 41.8 mm, W: 8 mm
FSA Part Code: 160-1647 Learn More -
1" ACB 6805 FC Stainless Steel Suspension & Headset Bearing (Enduro MAX)
US$39.13Available 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$16.59In Stock
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$16.77In 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$14.10In 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$77.48Available 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$64.90Last 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$14.89In Stock
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$13.98In 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$19.63Available 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$34.88In 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$21.27In 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$43.87Last One Left
ID: 40 mm, OD: 52 mm, W: 6.5 mm
Stainless Steel Learn More -
ACB3645 1.8" Headset Bearing (Monocrome)
US$23.70In 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$16.41In Stock
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ACB4545 1 1/8" Headset Bearing (Monocrome)
US$13.98In 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$39.98Available 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$21.27In 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$52.38In Stock
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$23.58In 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$23.15Last One Left
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$46.12Available 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$16.41In 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
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Shopping Options
- Bearing Internal Diameter (ID)
- Bearing Outside Diameter (OD)
- Bearing Material
- Bearing Chamfer
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