6805-RD Bike Bottom Bracket Bearing 25x37x6mm HT2 BB51
6805-RD Bike Bottom Bracket Bearing 25x37x6mm HT2 BB51
6805-RD Deep Groove Ball Bearing for Bike Bottom Brackets
Keep your ride smooth and efficient with this high-quality 6805-RD Bicycle Bottom Bracket Bearing. Engineered to fit popular bottom bracket standards including HT2 and BB51, this precision deep groove ball bearing (model MR25376 / SC6805N) delivers reliable performance for road, mountain, and gravel cycling applications.
Made in Mainland China.
Key Specifications
- Model: 6805-RD / MR25376 / SC6805N
- Structure: Deep Groove Ball Bearing
- Material: High-grade bearing steel
- Inner Diameter: 25 mm
- Outer Diameter: 37 mm
- Thickness: 6 mm
- Closure Type: Rubber sealed (RD)
- Lubrication: Pre-greased for long-lasting smooth operation
- Dynamic Load Rating (Cr): 4,150 N
- Static Load Rating (Cor): 2,382 N
- Compatible With: HT2, BB51 bottom bracket systems
- Package Includes: 1 × Bearing
Why Choose This Bearing?
- ✅ Precision-engineered deep groove ball design for minimal friction and maximum efficiency
- ✅ Rubber sealed construction keeps dirt, water, and contaminants out for longer service life
- ✅ Pre-greased internals ensure smooth, consistent rotation straight out of the box
- ✅ High-grade bearing steel construction for durability under demanding cycling loads
- ✅ Exact-fit dimensions (25×37×6 mm) for direct replacement in HT2 and BB51 systems
Compatible Bottom Bracket Systems
This bearing is a direct replacement for the 6805-RD specification used in a wide range of threaded and press-fit bottom bracket assemblies, including HT2 (e.g. FSA, Truvativ) and BB51 (e.g. Shimano) standards. Always verify your bottom bracket model before ordering to ensure compatibility.
Notes
- Due to manual measurement, please allow a tolerance of ±1–3 mm.
- Actual product color may vary slightly from images due to monitor display differences.
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Frequently Asked Questions
Q: What bike bottom bracket standards is the 6805-RD bearing compatible with?
A: The 6805-RD bearing (MR25376 / SC6805N) is designed for use with HT2 and BB51 bottom bracket systems, which are found on many road and mountain bikes from brands such as FSA, Truvativ, and Shimano. Always confirm your specific bottom bracket model to ensure a correct fit before purchasing.
Q: What are the exact dimensions of this bottom bracket bearing?
A: This bearing measures 25 mm inner diameter × 37 mm outer diameter × 6 mm thickness, making it a standard 6805-series bearing. The rubber sealed (RD) closure and pre-greased internals make it ready to install right away.
Q: Is this bearing suitable for replacing a worn or damaged bottom bracket bearing?
A: Yes. This is a direct replacement 6805-RD bearing for HT2 and BB51 compatible bottom brackets. The high-grade bearing steel construction and rubber seal make it a reliable upgrade or replacement option for cyclists looking to restore smooth, efficient pedaling performance.
Q: Does the bearing come pre-lubricated?
A: Yes, the bearing comes pre-greased from the factory. The rubber sealed design helps retain the grease and keep contaminants out, so no additional lubrication is needed before installation.