LA Choppers 1 Billet Performance Risers Like all other LA Choppers products, these Performance Risers are exactly what they are called. Designing with performance in mind, but still producing a stylish riser is not an easy task. These risers are proof that it can be done. Features: For use with bars with 1 clamping area Machined from billet aluminum Available in multiple finishes For use with 3-1/2 on-center handlebars