Wholesale 6805-RD Single Sealed Bearings for Bicycle Bottom Brackets
| Item No : | 6805-RD / 6805-1RS |
| Size (d*D*B) : | 25×37×6mm |
| Material : | Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.018KG |
| MOQ : | 100 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
Searching for the ultimate balance between weather protection and zero-drag pedaling efficiency? The 6805-RD Bicycle Specific Bearing (25x37x6mm) features a highly specialized asymmetric design: a robust rubber seal on the outward-facing side to block elements, and an open back (unsealed) facing the internal cavity. This unique configuration is the secret weapon for high-end Bottom Brackets (BB) and precision hubs, allowing internal grease to circulate freely while drastically reducing seal friction compared to standard 2RS bearings. As a premier B2B bearing trader, RMO supplies these meticulously engineered, ultra-thin cycling bearings to global wheelset builders and BB manufacturers, ensuring every watt of rider power translates to pure speed.
⚙️Product Features:
- Asymmetric RD Design (1RS): One side features a low-friction rubber contact seal facing the elements, while the open side faces the sealed internal component housing, cutting mechanical drag in half.
- Ultra-Thin 6mm Profile: The precise 25x37x6mm geometry makes it a crucial fit for modern oversized bottom bracket spindles and narrow hub shells where space is at a premium.
- Internal Lubrication Synergy: The open inner side allows the bearing to share the specialized grease pool within the bottom bracket shell, ensuring continuous, maintenance-free lubrication.
- Optimized Rotational Mass: By eliminating the inner seal and utilizing an ultra-thin section, rotational weight is minimized for rapid acceleration in competitive road and MTB cycling.
- B2B Sourcing Expertise: We provide high-volume wholesale of RMO brand RD-spec bearings, and offer extensive sourcing for specific OEM cycling bearing requirements worldwide.
⚙️Product Application:
Engineered for the specific internal architectures of high-performance bicycles, the 6805-RD is primarily utilized in:
- Premium Press-Fit and Threaded Bottom Brackets (BB30, PF30, BB86/92).
- Specialized lightweight road bike and MTB front/rear wheel hubs.
- High-end headset lower bearings requiring single-side environmental protection.
- Internal drivetrain assemblies where low drag is prioritized over dual-side sealing.
- Global bicycle component factories, elite cycling mechanic workshops, and aftermarket upgrade distributors.
⚙️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. | |
| Bearing Type | Ultra-Thin Section Deep Groove Ball Bearing |
| Dimensions | |
| Material | |
| Seal Type | RD: One side Rubber Seal, One side Open |
| Primary Advantage | 50% Less Seal Drag / Shared Internal Lubrication |
| Precision Grade | ABEC-3 / ABEC-5 (High rotational accuracy) |
| Clearance | CN or specific hub/BB press-fit clearance |
| 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 |
| Bearings No. | d*D*H(mm) | WT(KG) | Bearings No. | d*D*H(mm) | WT(KG) |
| 12267RS | 12*26*7 | 0.015 | 19307RS | 19*30*7 | 0.023 |
| 15267RS | 15*26*7 | 0.012 | 190537RS | 19.05*37*9 | 0.004 |
| 152610RS | 15*26*10 | 0.012 | 19317RS | 19*31*7 | 0.023 |
| 16257RS | 16*25*7 | 0.014 | 19379RS | 19*37*9 | 0.037 |
| 16287RS | 16*28*7 | 0.014 | 22317RS | 22*31*7 | 0.032 |
| 17287RS | 17*28*7 | 0.013 | 22379RS | 22*37*9 | 0.037 |
| 163110RS | 16*31*10 | 0.026 | 215317RS | 21.5*31*7 | 0.014 |
| 173110RS | 17*31*10 | 0.025 | 24377RS | 24*37*7 | 0.019 |
| 6805-RD | 25*37*6 | 0.018 | 24378RS | 24*37*8 | 0.023 |
| 30406RS | 30*40*6 | 0.017 | 18338RS | 18*33*8 | 0.023 |
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