Wholesale 52427-2RS Dual-Sealed Bearings for Gravel & MTB Headsets
| Item No : | 52427-2RS / ACB52427-2RS |
| Size (d*D*B) : | 42x52x7mm |
| Material : | Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.027KG |
| MOQ : | 50 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
When cyclists tackle aggressive Gravel races, muddy Cyclocross trails, or extreme wet-weather commuting, standard headset bearings inevitably succumb to grit and water intrusion. The 52427-2RS Angular Contact Headset Bearing (42x52x7mm) is strictly designed for these punishing conditions. Unlike standard single-seal variants, this “2RS” model features heavy-duty rubber contact seals on both sides, creating an impenetrable fortress against high-pressure washes and abrasive mud. Retaining the exact IS52 industry dimensions for 1.5″ tapered forks, it guarantees buttery-smooth steering even in the harshest climates. As an expert B2B bearing trader, RMO supplies these extreme-duty steering components to global all-road bike manufacturers and mechanics, ensuring zero-maintenance reliability for hardcore riders.
⚙️Product Features:
- Dual-Face 2RS Sealing: Equipped with two robust rubber contact seals (top and bottom), offering double the protection against torrential rain and pooled sweat compared to standard ACB bearings.
- Marine-Grade Grease Pre-fill: Packed with high-adhesion, water-resistant grease that prevents internal corrosion and wear, significantly extending service life for winter riding.
- Angular Contact (ACB) Toughness: Precision inner and outer chamfers distribute heavy frontal impacts (from rocks and potholes) safely into the frame without compromising rotation.
- IS52 & 1.5″ Drop-In Fit: The 52mm outer diameter drops perfectly into modern integrated carbon or alloy head tubes, delivering creak-free stability for oversized steerers.
- B2B All-Weather Solutions: RMO provides mass manufacturing capabilities for these specialized extreme-weather bearings, including customizable chamfer angles to match specific OEM headset cups.
⚙️Product Application:
Engineered for maximum weather defense and front-end durability, the 52427-2RS is essential for:
- All-weather Gravel, Cyclocross (CX), and Bikepacking adventure bicycles.
- Winter-specific training road bikes and daily commuter E-bikes.
- Heavy-duty Enduro MTBs exposed to frequent high-pressure bike washing.
- IS52 upper or lower headset assemblies demanding a “fit-and-forget” maintenance approach.
- Global boutique frame builders and high-volume all-road bicycle factories.
⚙️Precautions:
| 1. Keep clean | 2. Use with caution | 3. appropriate tool | 4. Hot-loading | 5. Be careful of rust |
| Dust will have a bad effect on the bearing, so keep the surrounding clean. | Strong impact during use can easily cause scratches and indentations. | Avoid replacing existing tools, and use appropriate tools. | Bearings are precision parts, so hot installation is recommended. | Sweat on your hands during operation will cause rust, so it is best to wear gloves. |
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⚙️Obtain Certificate:
About Rimao
Since its establishment in 2011, Rimao Bearing has combined international vision with local wisdom and injected innovative ideas into every bearing and pulley with its profound industry accumulation and unremitting pursuit of technology. We have not only passed CE and ROHS certification, but also set a new benchmark in the industry and led the development trend of the bearing industry.
We are not just a ball bearing and roller bearing importer and wholesaler. We provide real solutions to help you achieve the product and design goals set by your customers. With more than 20 years of production and sales experience, tens of thousands of models and specifications, we look forward to cooperating with you!
⚙️Technical Parameters:
| Model No. | |
| Dimensions | |
| Structural Design | Angular Contact Bearing |
| Chamfer Angle | Configurable (e.g., 45°/45°, 36°/45°) |
| Headset Standard | Compatible with IS52 (1.5″ Tapered Steerers) |
| Material | |
| Seal Type | 2RS (Dual-Sided Rubber Seals for Max Protection) |
| Lubrication | 100% Water-Resistant Marine-grade Grease |
| Weight per Piece | |
| Brand | RMO/Neutral/OEM/Other Brand |
| Package | |
| Lead Time | |
| Shipping | |
| Payment | 100% TT, or 30% TT In Advance, 70% TT After Finished Production |
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