Custom Rasp Bull Riding Spurs. Choose your shank length, with or without a twist, and the degree offset you would like. The standard bull spur is a 2" shank with a 22° offset. These spurs are heavy duty and should not bend. Bands and shanks are built to last. The benefits to buying a high quality spur is you don't have to purchase another set for quite some time! Have a great unique look to them!