The Speed from Sidi represents the benchmark for performance cross country and cyclocross shoes. Sidi is known for the longevity of its products, the Speed MTB is no exception. The Speed's are ready to tackle anything from techy single track to limy cross courses. Featuring a Proprietary (and replaceable) Sidi dial to ensure even pressure distribution over the forefoot and solid heel retention these disco slippers have all the hallmarks of a great shoe.