Cogsets come in two varieties, freewheels or cassettes, of which cassettes are a newer development. Competitors use track bicycles which do not have brakes or freewheels. These hubs accepted either Left or right side drive freewheels in the smaller 13T-15T sizes. This allows different brands of freewheels to be mounted on different brands of hubs. Both could also be freewheels for two different coasting gear selections. Star Cycles introduced a band brake in 1902 on its bicycles with freewheels. Multiple speed freewheels were common on quality high end bikes until the late 1980s. The transmission freewheels when not driving forward, so there is no engine braking. Both Enright and Freewheels chairperson Sharon McMillan respond to the growing controversy.