**The hub internal steel ball cup and steel cup shield are manufactured precisely by Material -SUJ2, both can assemble steel balls or ceramic balls.
**Design Core: The steel cup shield in the right side of the hub is fixed, the left is adjustable side. When we adjust the left adjustable side, bilateral steel cup shield can be automatically guided to maintain the axle in the center of the hub. When balls、steel ball cup & steel cup shield will be able to contact closely, hubs will run more smoothly.
| Front | Rear |
| Spoke Hole ----16、18、20 H | Spoke Hole ----8-16、18、20、24 H |
| Axle Dim. ----- ∅9(ID5.2)*100*110mm | Axle Dim. -----∅10(ID5.2)*130*140mm |
| Axle O.D. --- ∅12 mm | Axle O.D. --- ∅12 mm |
| Axle Material -Alloy 7075 T6 | Axle Material -Alloy 7075 T6 |
| Hub Material --AL6061 T6 | Hub Material --AL6061 T6 |
| Flange PCD ---39mm | Flange PCD ---35mm-49mm |
| Loose Balls 2-5/32 *15pcs | Loose Balls 2-5/32 *15pcs & Bearing * 2pcs |
| Weight-----112g | Weight--------222g |