The first product in our coming line of wheelchair products, Bill Shook designed a light weight bolt-on hub for improved riding performance. This hub is about a smooth ride, fast accelerations and maintaining speed. The titanium bolt is a standard 1/2” × 24 tpi with internally recessed 8mm recessed socket head for easy on and off. Large 17mm axle and stout 17mm stainless steel bearings. Stiff and strong with big 3.5mm thick high flanges. Sealed system to keep dirt out of the bearings. Easy maintenance. Slim looking high flange cut outs top off this upgrade to your bike or race chair.