The TriMax Clip-on offers the best combination of weight, aerodynamics, comfort and ease of use. With a wide range of stack and width adjustment it can fit anyone from the amateur to the pro. Highly adjustable and customizable Clip-On design Easy set-up and adjustability via open-access underside bolts Lightweight alloy extensions Low-profile armrest pads Internal cable routing and Di2 compatible 40mm armrest width adjustment Stack: 55mm Reach: -9mm to -99 (Center of clamp to rear edge of armrest -7.5mm Increments) Width: 210mm to 360 (15mm Increments) Armrest Rotation: 0-13°