The FSA TH-070E MR170 is a high-precision angular contact headset bearing, designed to restore smooth, stable and precise steering to your bike. Intended for 1.5-inch (1-1/2") steerers, this replacement bearing eliminates play and parasitic friction, instantly restoring the original performance of your FSA headset.

Technical Highlights

• ACB (Angular Contact Bearing) Technology: 45°x45° angular contact design that perfectly distributes simultaneous radial and axial loads. The offset raceways between the inner and outer rings ensure optimal force transmission during cornering, braking and challenging terrain.
• Professional double sealing: Integrated Dual Seal gaskets that effectively protect against water, mud and contaminants, extending bearing life even in extreme conditions.
• High-strength stainless steel: Rings and balls machined from hardened steel (type AISI 52100/GCR-15) hardened to Rc 59-64 before final grinding and polishing, ensuring exceptional wear resistance and maximum longevity.
• Optimized machining precision: Refined internal construction ensuring smooth rotation, minimal friction torque and long-term reliability, even under heavy loads.

Compatibility and Installation

Universal replacement bearing for a wide range of FSA headsets equipped with 1.5-inch steerers. Dimensions: 40 mm (ID) × 52 mm (OD) × 7 mm (H). Compatible with Campagnolo standards and modern integrated systems (IS). Equivalents: TH-070E, MR128, MR170, MH-P16. Unit weight of only 28 grams.

Disciplines and Use

Designed for versatile Road and MTB use, this bearing meets the demands of discerning cyclists seeking reliability, smoothness and performance. Whether you ride on asphalt or technical trails, it guarantees responsive, stable and play-free steering, for confident riding.