Time to explore the outdoors and get into mountain biking on this great entry-level 27.5 MTB, featuring disc brakes. Features - If you're looking to get started in the adventurous world of mountain biking, then the MTB Sport Disc is a great place to start. - The MTB Sport Disc is equipped with a Zoom 100mm travel suspension fork and Shimano TX800 21-Speed RapidFire gearing, and runs on the popular 650B (27.5 inches) size wheelset with JAKS disc brakes.