ENVE Composites M7 Mountain Handlebar - 800mm 10mm rise 35.0 8/4 deg BlackENVE Composites M7 Mountain Handlebar 800mm 10mm rise 35. 0 8 4 deg Black. The M7 bar is our 35mm bar for the most aggressive and demanding riders. Carbon fiber is the ideal material for a gravity bar because fiber orientation and bar shape can be controlled independently and developed in unison resulting in a tuned flex profile that cannot be achieved with aluminum. This bar is tuned to be precise and responsive while absorbing fatigue inducing