10 Pcs 18307RS Bearing MR18307 18307 18*30*7 mm Bicycle Axle 18307-LBLU Drum Ball Bearings 18307 MR18307 for DT Swiss Hubs
Suitable for: A2Z brand XCR rear hub, XCF hub, Qinghao (CH Disc/HH series) hub, Halo Mercury Rear Hub Halo and many other brands of bicycle hubs. (Please select the bearing according to the bicycle model and specification. For details, please contact customer service)
ABEC-5: Bearing inner and outer rings and steel balls are made of [bearing steel] with a hardness of HRA62 degrees, which is much higher than ordinary bearings. High-strength bearing special grease is added inside. The bearing has high adaptability, good rotation flexibility, small friction torque, and long service life (the actual use by customers is more than 50,000 kilometers). It is professionally matched with various high-end bicycle axles. (This type of bearing is specially customized by customers, in line with EU standards, and is exported to Europe, America and Taiwan markets for a long time)
ABEC-3: The material, appearance, and size are basically the same as those of high-quality bearings, but they are downgraded products that fail to meet the [ABEC-5] standard during the production and testing process. The bearings are matched with precision, rotation flexibility and service life. It's worse, it's suitable for general mid-range bicycles and car dealers' maintenance department.
ABEC-1: The material, appearance, and size are basically the same as those of high-quality bearings, except that they are downgraded products that fail to meet the [ABEC-3] standard during the production and testing process. The bearings are matched with precision, rotation flexibility and service life. It's worse, it's suitable for general mid-bottom gear bicycles and car dealers' maintenance department.
Installation note:
Don't knock the bearing vigorously, put the damaged bearing pad outside, and gently knock on the damaged bearing in a balanced way, don't knock on the new bearing.
![](https://ae01.alicdn.com/kf/S69ee3055d4c24847a176523d7a597a6ck.jpg)