Wholesale 30406-2RS Ultra-Thin Bearings for 30mm Crank Spindles
| Item No : | 30406-2RS (Ultra-Thin Bicycle Bearing) |
| Size (d*D*B) : | 30x40x6mm |
| Material : | Premium Chrome Steel GCr15 |
| Lead Time : | 3-5 days |
| Weight : | 0.017KG |
| MOQ : | 50 pcs |
| Service : | Support Sample Testing |
⚙️Product Description:
When cycling engineers push for maximum frame stiffness and absolute minimum weight, they turn to oversized 30mm crank spindles. The 30406-2RS Bicycle Bearing (30x40x6mm) is masterfully crafted for this exact application. Featuring an ultra-thin 6mm profile, this bearing fits seamlessly into tight bottom bracket (BB) shells while accommodating large 30mm alloy or carbon spindles without adding unnecessary bulk. Protected by premium 2RS rubber seals against sweat and road grime, it delivers uncompromising power transfer for elite road and mountain bikes. As a trusted B2B bearing trader, RMO supplies these specialized ultra-thin bearings to global BB manufacturers and high-end workshops, while offering flexible sourcing for any custom cycling bearing specification.
⚙️Product Features:
- 30mm Oversized Compatibility: The 30mm inner bore is precision-machined to directly support oversized performance cranksets (such as BB30, PF30, and BB386EVO standards) for maximum torsional stiffness.
- Ultra-Thin 6mm Profile: Minimizes the cross-sectional area, saving crucial grams and allowing frame designers to utilize wider, stiffer bottom bracket shells without chainline interference.
- Maximized Radial Stiffness: Despite its thin profile, it is forged from high-density SAE52100 chrome steel, ensuring the bearing rings do not deform under explosive sprint wattages.
- 2RS Weather Defense: Outfitted with robust dual contact seals that lock out corrosive moisture pooling in the frame and retain the high-performance synthetic grease inside.
- B2B Wholesale & OEM Support: RMO provides vast inventory capacities for standard aftermarket upgrades, as well as dedicated supply chain solutions for factory-level assembly lines.
⚙️Product Applications:
Engineered for lightweight stiffness and space-constrained applications, the 30406-2RS is pivotal for:
- BB30, PF30, and BB386EVO high-performance bottom bracket systems.
- Cranksets utilizing oversized 30mm aluminum or carbon spindles (e.g., RaceFace Cinch, Rotor, FSA).
- Custom ultra-thin headset assemblies for internal cable routing systems.
- Specific lightweight full-suspension MTB main pivot linkages requiring a 30mm shaft.
- International high-end CNC bicycle parts manufacturers and elite 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 | Thin-Section Deep Groove Ball Bearing |
| Dimensions | |
| Material | |
| Spindle Target | 30mm Oversized Crank Spindles |
| Profile Advantage | 6mm Ultra-Thin Section for Weight Saving |
| Seal Type | 2RS (Dual Contact Rubber Seals) |
| Precision Grade | ABEC-3 / ABEC-5 (Zero-play smooth rotation) |
| Clearance | CN / C3 (Calibrated for alloy BB shell press-fit) |
| 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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