Features: It can be used with the common 100x12MM road disc brake hub, and which can be supported on the market. 3-way seal design to the conversion seat, that hub is high precisions and strong stability after installed. It avoids the need to replace that hub when upgrading the front fork, which greatly save money for enthusiasts. 15MM barrel shaft conversion to 12MM mini barrel shaft, universal conversion bushing fit most bike hubs. Bike hub front tube shaft conversion seat adapter made of aluminum-alloy material, light weight and high strength. Specifications: Material: Aluminum-Alloy Color: Black/Red/Golden/Blue Package Weight: approx.30g Size: approx.30x20.8x15mm/1.18x0.81x0.59in Package Includes: 2Pcs x Bikes Front Hub Adapter note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!