27.5 inch  SHUNAN nine-speed cassette DY ISLAND oil brake six spike discs Alloy aluminum lightweight material 27.5*18 Aluminum alloy locking front fork Lightweight aluminum alloy handlebar crossbar 720mm Lightweight aluminum alloy handlebar Rubber locking handlebar cover Lightweight aluminum seat post Widened Villeroy & Boch saddle Aluminum frame custom bowl set |TAYCO Aluminum Single Disc 36T SHUNAN 9-speed cassette 32T |FSC Chain Aluminum pedals for mountain bikes Durable  Lightweight Rims Aluminum cassette hub (with quick release) 1584 MTB Tires 27.5