Deda Kronos aerobar is for riders who like to get low in their timed-event position. The basebar is a carbon-fiber wing with zero drop in 42cm width measured outside-to-outside. The wing is hollow and allows for the internal routing of brake cables and electronic shift wires. There are cylindrical holes that house the extensions and the threaded inserts to secure the armrests to the bars. Kronos comes with the Fastblack2 carbon extensions with a J-bend and can be extended up to 370mm. Compatible with any brake/shifter levers, either mechanical or electronic. Includes comfortable pads made in lycra plus inside foam. 25 mm aluminum spacers to increase the armrest stack height armrest are available as spare parts (part code: Kriserkit)