These are the bontrager 2013 race lite lowriser 318mm 720mm handlebars extremely lightweight and durable fabricated from custom butted 7050 t6 aluminium and shot peened for added fatigue strength designed and tested to meet bontragers stringent standards for fatigue and impact strength 318mm clamp section for improved bar stiffness and control 80mm of measured cut marks for easy and precise width modifications performed by an authorized dealer bar end compatible 15mm or 5mm rise optio