Material type:Aluminum Batteries included?:No Product Dimensions:15 x 15 x 5 cm; 29 Grams Features: Bike hub adapter is made of quality materials, high strength, anti-rust, non-deformation and durable. CNC machining makes the surface smooth and can prevent abrasion damage. With this adapters, you can change 100*15mm front hun into 110*15mm, and 142*12mm rear hub into 148*12mm. Comes with necessary fittings, easy to install and use. Specification: Material: Aluminium Alloy Color: Shown as picture Options: for Front ; for Rear Fit for 100*15mm to 110*15mm(for front), 142*12mm to 148*12mm(for rear) Size: Approx. 5.3 x 5.3 x 0.2cm / 2 x 2 x 0.078inch Weight: Approx. 28-33g Package List: 1 x Bike Hub 2 x Washers 6 x Screws About this item Non-Deformation And Durable: Bike hub adapter is made of quality materials, high strength, anti-rust, non-deformation and durable Prevent Abrasion Damage: CNC machining makes the surface smooth and bike hub conversion adapter can prevent abrasion damage Specification: Bike hub conversion with this adapters, you can change 100*15mm front hun into 110*15mm, and 142*12mm rear hub into 148*12mm Easy To Install: bike front hub conversion comes with necessary fittings, easy to install and use Good Accessory: bike rear hub conversion isa useful accessory for bike lovers to DIY bike Non-Deformation And Durable: Bike hub adapter is made of quality materials, high strength, anti-rust, non-deformation and durable Prevent Abrasion Damage: CNC machining makes the surface smooth and bike hub conversion adapter can prevent abrasion damage Specification: Bike hub conversion with this adapters, you can change 100*15mm front hun into 110*15mm, and 142*12mm rear hub into 148*12mm Easy To Install: bike front hub conversion comes with necessary fittings, easy to install and use Good Accessory: bike rear hub conversion isa useful accessory for bike lovers to DIY bike