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Headsets
$63.99
Service and replacement parts specifically for Trek Knock Block technology.
Genuine replacement parts
Get your bike back on the trail with the headset parts you need.
- Trek proprietary headset components compatible with Trek Knock Block models
- 72-degree headset fits 2021 Slash 29
- Includes crown race, bearings, top cover, frame chip & fastener
- Frame chip has display tabs to connect Bosch Kiox Mount sold separately
- Must be paired with Knock Block stem and Knock Block spacers
- Knock Block headset spacers not included
$6.99 - $14.99
- Steel cups
- Steel retainer bearings
- Available in chrome or black
- S.H.I.S.: EC32/25.4-24tpi|EC32/27
- Steerer Dia: 25.4mm
- Cup Dia: 32.5mm
$9.99 - $20.99
- Steel cups
- Steel retainer bearings
- Available in chrome or black
- Steerer Dia: 25.4mm
- Cup Dia: 30mm
$12.99
• Steel
• Retainer ball bearings, includes top cap and star nut
• 1 1/8 inch
• S.H.I.S.: EC34/28.6, EC34/30
$12.99
• Steel
• Retainer ball bearings, includes top cap and star nut
• 1 inch
• S.H.I.S.: EC30/25.4, EC30/26
$14.99
- Steel cups
- Steel retainer bearings
- Available in chrome or black
- S.H.I.S.: EC34/28.6-26tpi|EC34/30
- Steerer Dia: 28.6mm
- Cup Dia: 34mm
- Race Dia: 30mm
- Stack Ht: 40mm
Size: 1-1/8"
$19.19
- Steel cup semi-integrated design
- Threaded semi-integrated design
- Fits many Sun cruisers and others
- Caged bearing 5/32" x 22A
- Cup Diameter: 44mm
- Race Diameter: 30mm
- Stack Height: 18.2mm
$26.99
• Aluminum
• Semi-sealed mechanism
• 1 1/8 inch
• S.H.I.S.: EC34/28.6, EC34/30
$21.99
The Sunday BMX integrated headset is designed to be a quality headset at an affordable price.
- Laser-etched Sunday logo
- Color-matching spacers included
- Gyro compatible
- High quality sealed bearings and precision tapered wedge help to keep the headset tight
$21.99
The Sunday BMX integrated headset is designed to be a quality headset at an affordable price.
- Laser-etched Sunday logo
- Color-matching spacers included
- Gyro compatible
- High quality sealed bearings and precision tapered wedge help to keep the headset tight
$22.99
The Revolver headset features a high precision CNC 6061 Aluminum bearing cover with triple rubber seals for a perfect fit.
- Campy spec 45x45 sealed bearings
- 15mm dust cover stack height
- 2.7oz (76.54g)
- Materials: Aluminum Cover, Chromoly Crown Race
$24.99
New dust cap design, with Monogram laser etched logo, for a cleaner look to accommodate a taller riding set up with less spacers. Same quality as Odyssey's Pro Headset using high-quality sealed bearings and a precision tapered wedge to keep the headset tight at all times.
FEATURES
- High-quality sealed bearings.
- Color matched spacers included.
- 15mm dust cap. With 3mm, and 2mm spacers
- Laser etched Odyssey bearings.
SPECS
- Campagnolo standard spec.
- 1 1/8-inch integrated headset.
- 45º tapered bearings
- 41.8mm outer diameter (fits 42mm BMX head tubes).
$26.99
Designed using high-quality sealed bearings and a precision tapered wedge to keep the headset tight at all times.
FEATURES
- High-quality sealed bearings.
- Color matched spacers included.
- 10mm, 3mm and 2mm (15mm total)
- Laser etched Odyssey bearings.
SPECS
- Campagnolo standard spec.
- 1-1/8 integrated headset.
- 45º tapered bearings 41.8mm outer diameter (fits 42mm BMX head tubes).
$26.00
-Aircap OD2 expander system steerer plug (2012-2016)
$3.00
FSA Standard Headset Bearings
$14.99 - $19.99
- Forged steel cups with caged 5/32" ball bearings
- TH-857 features a alloy top cover
- TH Series: External Cup, traditional
- S.H.I.S.: EC34/28.6|EC34/30
- Stack: 14.9mm/11mm
- Color: Black
- Weight: 126g
$16.99
- CrMo headset with oversized 3/16" lower ball bearings, 5/32" upper bearings and a nylon top cover
- Hammer: External Cup, traditional
- S.H.I.S.: EC34/28.6|EC34/30
- Stack: 12.8mm/11.9mm
- Color: Black
- Weight: 149g
$18.00
Replacement headset uppers from FSA.
- S.H.I.S. Stem Clamp Diameter: 28.6 Threadless
- Bearing Type: Cartridge
- S.H.I.S Upper: IS41
- Upper Stack Height: 8.2
$19.99
- CrMo headset with oversized 3/16" lower ball bearings, 5/32" upper bearings and an alloy top cover
- Mallet: External Cup, traditional
- S.H.I.S.: EC34/28.6|EC34/30
- Stack: 15.4mm/13.6mm
- Color: Black
- Weight: 150g
$19.99
- Carbon fiber top caps, bolt and steel star nut
- Size: 1-1/8"
- Color: Black
- Weight: 21g
$20.99
Replacement headset bearings from FSA.
- Compatible with most Trek MTB integrated headset systems
- Sealed bearing for long life
- Compatible with Knock Block Headsets
$21.99
A new headset gives you a new lease on life. This is the upper part of an integrated headset for a 44mm headtube.
- Lower part of the headset sold separately
$25.00
FSA Standard Headset Bearings