Wheel Master MX-4000 BMX Front/Rear Aluminum Flip-Flop Hubs Upper Size_.7 mm 5mm inner diameter and 37mm

5mm inner diameter and 37mm outer diameter

Integrated chain hook holds chain steady while removing or installing master link

Upgrade your bike's cable management system with the Jagwire Standard Straddle Carrier - the ultimate choice for enhanced ride quality

- High-quality aluminum construction for durability and weight savings

and DIY gear projects

Wheel Master MX-4000 BMX Front/Rear Aluminum Flip-Flop Hubs Upper Size_.7 mm 5mm inner diameter and 37mmUpgrade your BMX setup with the high performance Wheel Master MX 4000 BMX Front Hub, featuring a sleek Black finish designed for durability and style. Crafted from premium aluminum, this BMX hub offers exceptional lightweight performance without compromising strength, making it ideal for aggressive riding styles and intense BMX competitions. Materials & Construction: Built with high quality aluminum 48 hole (48H) construction, the MX 4000 hub ensures