Item No :
52427-2RS 45/45Size (d*D*B) :
42x52x7mmMaterial :
Gcr15.chrome steelBrand :
Famous brand/RMO/Neutral/OEM&ODMLead Time :
normally 3-5 daysWeight :
0.027KGShipping Port :
Guangzhou, Ningbo, ShanghaiMOQ :
50 pcs42x52x7mm 52427-2RS 45/45 Angular Contact Bicycle Headset Bearing
⚙️Product Description:
52427‑2RS 45/45 Angular Contact Bicycle Headset Bearing (42x52x7mm)
This bearing is designed specifically for modern bicycle headset systems using a 45°/45° angular contact structure. Featuring double rubber seals (2RS), it provides excellent dust and moisture protection, while ensuring smooth steering, improved sensitivity, and extended headset life. Compatible with MTB, road bikes, carbon bikes, and OEM replacement applications.
| Model No. | 52427-2RS 45/45 Bicycle Headset Bearing |
| Size | 42x52x7mm |
| Contact Angle | 45°×45° |
| Material | Chrome steel Gcr15 |
| Package | Plastic Tube/single box + Carton + Pallet |
| Service | OEM/ODM |
| Small order | Accept |
| Shipping Port | Guangzhou, Ningbo, Shanghai |
| Payment | 100% T/T, or 30% T/T In Advance ,70% T/T After Finished Production |
• 45°/45° angular contact design
• Double rubber seals (2RS)
• Low friction & smooth steering
• High precision & long life
• Excellent moisture resistance
• Ideal for high-end bicycles
| Bearings No. | d*D*H(mm) | Weight (G) |
| ACB305418H6.3-45/45 | 30.5*41.8*6.3 | 30 |
| ACB307418H7.7-45/45 | 30.7*41.8*7.7 | 30.1 |
| ACB3144H6.3-45/45 | 31.4*44*6.3 | 30.2 |
| ACB31448H6.3-45/45 | 31.4*44.8*6.3 | 32.6 |
| ACB32438H7-45/45 | 32.4*43.8*7 | 23 |
| ACB32418H6-45/45 | 32.8*41.8*6 | 16 |
| ACB3344H6-36/45 | 33*44*6 | 21 |
| ACB33438H7-30/45 | 33.05*43.8*7 | 23.8 |
| ACB3345H7-45/45 | 33.5*45*7 | 26.2 |
| ACB3446H7-45/45 | 34.1*46*7 | 25 |
| ACB34468H7-45/45 | 34.1*46.8*7 | 27.7 |
| ACB34469H7-45/45 | 34.1*46.9*7 | 28 |
| ACB3544H5-90/90 | 35*44*5 | 16 |
| ACB3544H5.5-36/45 | 35*44*5.5 | 32 |
| ACB354535H7.3-45/45 | 35*45.35*7.3 | 22.3 |
| ACB3547H8-45/45 | 35*47*8 | 29.9 |
| ACB36458H6.5-45/45 | 36.8*45.8*6.5 | 18.9 |
| ACB3748H7-45/45 | 37*48*7 | 27 |
| ACB37489H6.5-36/45 | 37*48.9*6.5 | 25.9 |
| ACB3749H6.5-36/45 | 37*49*6.5 | 25.25 |
| ACB3749H7-36/45 | 37*49*7 | 28.1 |
| ACB3749H7-45/45 | 37*49*7 | 28.8 |
| ACB4051H6.5-36/36 | 40*51*6.5 | 24.8 |
| ACB4051H8-36/45 | 40*51*8 | 29.3 |
| ACB4051H7-45/45 | 40*51*7 | 31 |
| ACB40515H7-45/45 | 40*51.5*7 | 30.8 |
| ACB40518H7-45/45 | 40*51.8*7 | 30.8 |
| ACB40518H8-36/45 | 40*51.8*8 | 32.6 |
| ACB40518H7.5-36/45 | 40*51.8*7.5 | 33 |
| ACB40518H8-45/45 | 40*51.8*8 | 33.1 |
| ACB40518H8-90/90 | 40*51.8*8 | 33.1 |
| ACB40519H7-45/45 | 40*51.9*7 | 29.6 |
| ACB40519H8-45/45 | 40*51.9*8 | 32.6 |
| ACB4052H6.5-36/45 | 40*52*6.5 | 29.2 |
| ACB4052H7-90/90 | 40*52*7 | 30.9 |
• Bicycle headsets
• MTB
• Road bikes
• Carbon bikes
• OEM & aftermarket replacement
| 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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