The Mercury chassis takes a S, this is the latest version of our top-range model. The Mercury S, available in the single speed version and with the gearbox, is even lighter in favour of a better handling. The two World Championships won in the last two seasons, gave additional energy to the Kosmic Kart Racing Department and to OTK Kart Group R&D department, so the Mercury S presents several enhancements on the frame made of molybdenum chrome tubes of √ò 30 mm, thus placing it always, and only, at the top.