Fsa 1-1/8'' TH-873E ACB 36x45° single seal MR122 sealed bearing - Black
Fsa 1-1/8'' TH-873E ACB 36x45° single seal MR122 sealed bearing - Black - One size is backordered and will ship as soon as it is back in stock.
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Product details
Product details
Sealed 1-1/8'' TH-873E ACB bearing: performance and reliability for the headset
The FSA TH-873E ACB sealed bearing is a technical benchmark solution for those seeking high-performance headset components. Designed to 36x45° standards, this bearing offers an optimized geometry to ensure smooth steering action and directional stability. Technical specifications include an internal diameter of 30.2mm and an external diameter of 41mm, with a reduced height of 6.5mm for compact integration in traditional headsets. The single seal MR122 effectively protects the interior from dirt, moisture, and contaminants, extending the component’s durability under varying riding conditions.
Construction specifications and bearing materials
The construction of the ACB bearing uses Cr-Mo (Chromium-Molybdenum) steel balls with a diameter of 1.8 inches, with 23 elements to ensure optimal load distribution. This material is selected for its resistance to wear and corrosion, essential characteristics in components exposed to the outdoor environment. The 36° contact angle at the entry and 45° at the exit allows balanced handling of radial and axial loads, typical of tapered bearings used in 1-1/8 inch headsets. The integrated sealing maintains consistent performance over time, reducing the need for frequent maintenance.
Applications and compatibility with standard headsets
The TH-873E complies with technical specifications for 1-1/8 inch headsets, the most common standard on road bikes, gravel and modern mountain bikes. The single seal design offers a compromise between protection and reduced friction compared with fully sealed solutions, maintaining smooth operation even after long periods of use. Its compact dimensions (ID 30.2mm, OD 41mm, H 6.5mm) allow direct installation in standard headset cartridges, simplifying replacement operations and routine maintenance at specialist workshops.
Technical features
- Internal diameter (ID): 30.2mm.
- External diameter (OD): 41mm.
- Height (H): 6.5mm.
- Contact angles: 36° inner / 45° outer.
- Ball type: Cr-Mo steel, 1.8-inch diameter, quantity 23.
- Sealing: Single seal MR122 for protection against contaminants.
- Compatible standard: 1-1/8 inch headset (ZS44).
- Manufacturer: FSA.
- Model: TH-873E ACB.
- Main application: Bicycle headset.
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Shipping and delivery times
Shipping and delivery times
Orders are usually shipped within 24-72 hours (1-3 days) from payment receipt. Some items may have longer shipping times (5-7 days). The specific shipping times are indicated on each product page.
FREE SHIPPING (bikes excluded) from
| € 79.00 | Italy |
| € 129.00 | Europe, Principality of Monaco, and San Marino |
| € 249.00 | Australia, Canada, Japan, Switzerland, Norway |
Shipping costs start from
| € 6.50 | STANDARD SHIPPING in Italy with express courier |
Shipping times and costs may vary depending on the delivery country, chosen service, and weight.
Shipping with InPost service
| € 5.00 | Italy |
| € 12.00 | France, Benelux, Spain, Portugal, Poland |
Bicycle shipping
Shipping costs for all bicycles are fixed as follows.
| € 39.00 | Italy |
| € 49.00 | Europe |
| € 69.00 | Rest of the world |
Non-EU shipping
Local VAT and any customs duties for shipments of goods to customers outside the European Union (non-EU) will be charged to the recipient and requested by the courier at the time of delivery. If the delivery is not made due to refusal to pay the customs duties (local VAT and any applicable tariffs) requested by the importing country, all costs incurred by us for the return of the goods will be deducted from the refund.
In-store pickup
All online-ordered items can be picked up at the All4cycling store in the province of Varese, Via Gianfranco Miglio 2, 21045 Gazzada Schianno (VA).
For further details, we invite you to review the terms and conditions and the privacy policy.
Returns and refunds
Returns and refunds
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RETURN SHIPPING COSTS
| Italy | FREE return at Poste Italiane post offices and collection points, following the instructions provided |
| Germany & Austria | Fixed cost €6.90 with DHL, deducted from the refund |
| Spain & France | Fixed cost €9.90 with DHL, deducted from the refund |
| Switzerland & Liechtenstein | Fixed cost €12.00 with Swiss Post, deducted from the refund |
| Other Countries | Variable cost depending on the carrier selected, fully payable by the customer |
The costs shown apply to returns made due to a change of mind. If the product is incorrect, damaged or not as described due to a cause attributable to All4cycling, the necessary return shipping costs will not be charged to the customer.