The premium ISIS bottom bracket cartridge ensures greater surface area contact, a sturdier connection, and less maintenance than a traditional square joint. The Hutchinson drive belt, ISIS bottom bracket cartridge, pulley size and material, gear ratio and three-piece crank have been carefully chosen on the CIC800 and incorporated into the overall design to assure optimal performance and durability. These components, along with an ergonomically correct frame design and full fore/aft/up/down adjustability, combine to make the perfect indoor cycle for your facility.