Item No :
30406 2RSSize (d*D*B) :
30x40x6mmMaterial :
Chrome steel Gcr15Lead Time :
Normally 3-5 daysWeight :
0.018KGPayment Terms :
100% T/T or 30% T/T in advance ,70% before deliveryShipping Port :
Guangzhou, Ningbo, Shanghai30406 2RS Sealed Deep Groove Ball Bearing for MTB & Road Bike
⚙️Product Description:
30406‑2RS Deep Groove Ball Bearing is a popular bicycle bearing model, widely used in mountain bikes, road bikes and e‑bike wheel hubs. It features double rubber seals (2RS) to protect against dust, dirt, mud and moisture, ensuring smooth rotation and longer service life in harsh outdoor conditions.
The bearing is precision-machined with low friction, providing high rolling efficiency, improved riding smoothness, and suitable for OEM wheel building or aftermarket replacement.

⚙️Technical Parameters:
|
Item No. |
30406 2RS |
|
Branding |
Famous brand/RMO/Neutral/OEM |
|
Seal Type |
Open, ZZ, 2RS |
|
Material |
Stainless steel (420 440C 304 316), chrome steel Gcr15, hybrid ceramic, full ceramic. |
|
Lead Time |
3-5 days |
|
Precision |
p0 p6 p5 p4 |
| Clearance | C2 C0 C3 C4 |
|
Vibration |
Z1V1, Z2V2, Z3V3 |
|
Cage Material |
Steel, nylon, copper |
|
Shipping Port |
Guangzhou, Ningbo, Shanghai |
|
Payment |
100% T/T, or 30% T/T In Advance ,70% T/T After Finished Production |
⚙️Bearing Features:
• Deep groove ball structure
• Double rubber seals (2RS)
• Low friction & smooth rotation
• Suitable for outdoor harsh conditions
• Anti-dust / anti‑mud / anti‑water
• Ideal for bicycle wheel hubs

| Bearings No. | d*D*H(mm) | WT(KG) | Bearings No. | d*D*H(mm) | WT(KG) |
| 12267RS | 12*26*7 | 0.0151 | 19307RS | 19*30*7 | 0.0234 |
| 15267RS | 15*26*7 | 0.0124 | 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 | 0.0131 | 22379RS | 22*37*9 | 0.037 |
| 163110RS | 16*31*10 | 0.0258 | 215317RS | 21.5*31*7 | 0.014 |
| 173110RS | 17*31*10 | 0.0254 | 24377RS | 24*37*7 | 0.019 |
| 6805-RD | 25*37*6 | 0.02 | 24378RS | 24*37*8 | 0.0232 |
| 30406RS | 30*40*6 | 0.018 | 18338RS | 18*33*8 | 0.023 |
• Bicycle Wheel Hub
• MTB
• Road Bike
• E‑Bike
• Replacement hub bearings
• OEM & aftermarket service
| 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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