Durability built with flex. Constructed from the highest quality aerospace aluminum for maximum strength. The 1-1/8" Pro Series Handlebar is also engineered to "flex" for reduced arm fatigue. Mika handlebars contain multiple applications for a personalized fit. Designed for maximum fatigue life. Manufactured to exact dimension specifications. Tested and used by today's top professionals. Note: Requires oversized (1-1/8") bar mounts.