Fit for 100*15mm to 110*15mm(for front), 142*12mm to 148*12mm(for rear) Size: Approx. For Front-5.3 x 5.3 x 0.5cm / 2 x 2 x 0.19inch; For Rear-5.3 x 5.3 x 0.3cm / 2 x 2 x 0.12inch Weight: Approx. 28-33g 【Easy Installation】Bike Front Hub Conversion,Each set comes with all necessary fittings, allowing for a hassle-free installation process that makes upgrading your bike quick and effortless. 【Smooth CNC Machining】Bike Hub Conversion,Precision CNC machining ensures a flawless surface finish, effectively preventing abrasion damage and enhancing the overall performance of your bike components. Package List: 1 x Bike Hub;2 x Washers;6 x Screws bicycle 148mm spacing 110mm adapter 100mm 142mm rear Options: for Front ; for Rear Disk Break Conversion Alloy Bike Hub Adapter Conversion Front 100 * 15 To 110 * 15 - Rear 142 * 12 To 148 * 12 Freewheel Threaded Hubs Adaptor Disc Brake Rotor Bolts 15mm To 12mm Thru Axle Adapter 【Versatile Compatibility】Bike Hub Conversion Adapter,Effortlessly convert your 100x15mm front hub to 110x15mm and your 142x12mm rear hub to 148x12mm, adapting your bike to fit various wheel setups.