Product Description
Genuine Trek replacement lower headset bearing for compatible Trek road bikes using the E2 headset system and a 53mm x 40mm x 7mm, 45-degree bearing.
Originally specified for select Trek Madone and District Carbon models, this bearing may also fit other Trek road bikes that use the same exact bearing dimensions and contact angle.
Because Trek has used several similar-looking headset bearings over the years, always compare the measurements and bearing angle with your original bearing before ordering.
Key Features
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Genuine Trek replacement headset bearing
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Lower headset position
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53mm outer diameter
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40mm inner diameter
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7mm height
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45-degree chamfer / contact angle
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Stainless steel construction
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Grey finish
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Designed for compatible Trek E2 headset systems
Specifications
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Brand: Trek
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Product Type: Lower Headset Bearing
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Bearing Size: 53mm x 40mm x 7mm
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Outer Diameter: 53mm
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Inner Diameter: 40mm
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Height: 7mm
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Contact Angle: 45°
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Bearing Type: Headset
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Material: Stainless Steel
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Color: Grey
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Position: Lower
Original Trek Compatibility
Trek specifies this bearing for:
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2008-2009 Trek Madone 6-Series
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2008-2010 Trek Madone 5-Series
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2008-2011 Trek Madone 4-Series
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Trek District Carbon
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Compatible Trek E2-equipped bikes using this bearing specification
Additional Compatibility
This same bearing size may also be used on other Trek road bikes, including some newer rim-brake and disc-brake platforms.
Compatibility should be confirmed by the actual bearing specification, not bike appearance alone.
Your existing lower bearing should match:
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53mm OD
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40mm ID
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7mm height
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45-degree contact angle
Trek uses other lower headset bearings with similar dimensions, including 51mm and 51.8mm versions, so measuring the original bearing is strongly recommended before purchasing.
Included
Condition
