Specialized Replacement Road Lower Headset Bearing 45x45D

Specialized Factory Replacement Headset Bearing – Size (49.5 × 40.5)

This Specialized factory replacement headset bearing features custom dimensions used across a wide range of Specialized road, gravel, and XC performance bikes. Designed to OEM specifications, it ensures precise steering, long service life, and correct headset preload when replacing worn or damaged bearings.

Bearing Specifications

• Outer Diameter (OD): 49.5mm

• Inner Diameter (ID): 40.5mm

• Thickness: 6.5mm

• Interface: Campagnolo-style 45° × 45° angular contact

• Material: Steel

Features

• OEM-correct replacement bearing

• Custom size specific to Specialized headset designs

• Campy-style angular contact for smooth, durable steering

• Steel construction for long-term reliability

OEM Compatibility (Selected Models)

This bearing is used as a headset bearing on many Specialized models, including but not limited to:

Tarmac

• Tarmac SL8 (Pro, Expert, S-Works, LTD & Framesets) – 2024–2025

• Tarmac SL7 (Comp, Expert, Pro, S-Works & Framesets) – 2022–2025

Aethos

• Aethos (Comp, Expert, Pro, S-Works & Framesets) – 2022–2025

Crux

• Crux (Comp, Expert, Pro, DSW, 10r & S-Works) – 2022–2025

Epic / Epic World Cup / Epic 8

• Epic World Cup (Pro, Expert) – 2023–2025

• Epic 8 (Comp, Expert, EVO, Pro, S-Works) – 2024–2025

Allez

• Allez Sprint (Comp, LTD) – 2023–2025

Recommended Use

• Headset bearing replacement during routine service

• Restoring precise steering feel

• Maintaining OEM headset stack height and geometry

⚠️ Fitment Note:
This bearing uses Specialized-specific dimensions. Always confirm compatibility by measuring the original bearing or verifying your bike model before ordering.

A genuine Specialized OEM headset bearing, built for accuracy, durability, and race-level performance.