Our latest Carbon Aero TT/Tri Bars are nice and light, adjustable, and very aerodynamic. We offer them with a 3k Carbon Weave finish in Gloss or Matte. Currently we only offer the 42cm width, but will exapand our sizes based on demand. The stem clamping diameter is the standard 31.8mm and works with a variety of stems. Weight is about 498 grams. The arm rest pads and the straigh or curved extentions are adjustable to optimize positioning. We offer a 2 year warranty and crash replacement deals. The bars will help you go FAST!