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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)Stainless Steel ACB (Angular Contact Bearing)
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36° internal chamfer. 45° external chamfer.
ID: 27.1 mm, OD: 38 mm, W: 6.5 mm
Enduro Part Code: ACB6805 SSUS$32.33 -
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1" ACB 6805 FC Suspension & Headset Bearing (Enduro MAX)Application: Niner Suspension Pivots & Trek Speed Concept Lower Headsets
ID: 27.1 mm, OD: 38 mm, W: 6.5 mm Learn MoreUS$13.70 -
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1.5" Crown Reducer Alloy (FSA)Fits 1.125" steerer. Adapts to 1.5" headset.
Fits 3645 bearings with 36° inner chamfer
FSA Part Code: 160-5540 Learn MoreUS$13.85 -
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1.5" Crown Reducer Steel (FSA)Fits 1.125" steerer. Adapts to 1.5" headset.
Fits 3645 bearings with 36° inner chamfer
FSA Part Code: 160-5538 Learn MoreUS$11.64 -
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1.5" Headset Lower Cup Assembly for 44 mm Head-tube Premium Version (FSA)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 MoreUS$64.01 -
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1.5" Headset Lower Cup Assembly for 44 mm Head-tube Standard Version (FSA)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 MoreUS$53.62 -
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6807-2RS FC Headset Bearing (Enduro MAX)Application: Headsets
ID: 35 mm, OD: 47 mm, W: 7 mm Learn MoreUS$12.30 -
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ACB 1.5" Headset Lower Bearing Kit (Monocrome)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 MoreFrom US$7.53
To US$25.10
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ACB3645 1 1/8" Headset Bearing (Monocrome)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 MoreUS$11.55 -
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ACB3645 1 1/8" Headset Bearing for IS42 Headsets (Cane Creek)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 MoreUS$17.32 -
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ACB3645 1 1/8" Stainless Steel FC Headset Bearing (Enduro MAX)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 MoreUS$28.82 -
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ACB3645 1.5" Headset Bearing (Monocrome)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 MoreUS$17.57 -
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ACB3645 1.5" Stainless Steel Cane Creek Lower Headset Bearing (Enduro)ID: 40 mm, OD: 52 mm, W: 6.5 mm
Stainless Steel Learn MoreUS$41.57 -
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ACB3645 1.8" Headset Bearing (Monocrome)Application: e-bike headsets, including Trek Rail
36 x 45 degree ACB
ID: 50 mm, OD: 61.9 mm, W: 8 mm Learn MoreUS$19.58 -
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ACB4545 1 1/8" Headset Bearing (Monocrome)Application: 1 1/8" 4545 Headsets 45 x 45 degree ACB
41 mm OD, 30.1 mm ID, 6.5 mm W Learn MoreUS$11.55 -
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ACB4545 1 1/8" Stainless Steel Headset Bearing (Enduro)Application: 1 1/8" 4545 Headsets 45 x 45 degree ACB
41 mm OD, 30.15 mm ID, 7 mm W Learn MoreUS$33.03 -
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ACB4545 1 3/8" Stainless Steel Headset Bearing (Enduro)Application: 1 3/8" Headsets (Specialized etc lower race)
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45 x 45 degree ACB
ID: 37 mm, OD: 49 mm, W: 7 mm
Stainless Steel
Enduro Part Code: ACB4545-1375-SS-SPECUS$38.76 -
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ACB4545 1.5" Headset Bearing (Monocrome)Application: 1.5" 4545 Headsets
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45 x 45 degree ACB
51.9 mm OD, 40 mm ID
6.3 mm across chamfers (see image)US$17.57 -
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ACB4545 1.5" Stainless Steel Headset Bearing (Enduro)Application: 1.5" 4545 Headsets
45 x 45 degree ACB
ID: 40 mm, OD: 52 mm, W: 7 mm
7.0 mm across chamfers (see image) Learn MoreUS$43.28 -
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B542-2RS FC Headset Bearing (Enduro MAX)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 MoreUS$19.48 -
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B543-2RS FC Headset Bearing (Enduro MAX)Application: Cannondale Lefty Headsets
ID: 1 9/16" (39.7 mm), OD: 2" (50.8 mm), W: 9/32"
Imperial bearing Learn MoreUS$19.13 -
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B543-2RS FC Stainless Steel Headset Bearing (Enduro MAX)Application: Cannondale Lefty Headsets
ID: 1 9/16" (39.7 mm), OD: 2" (50.8 mm), W: 9/32"
Imperial bearing Learn MoreUS$38.10 -
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Campy 4545 1 1/8" 1RS Headset Bearing (Monocrome)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 MoreUS$13.56 -
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Campy 4545 1 1/8" 2RS Stainless Steel Headset Bearing (Enduro)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 MoreUS$40.51
