Navi RS500 Hardtail Mountain Bike, Aluminum Alloy Frame, Disc Brakes, Shimano Acera 24-speed, 27.5" Wheel Mountain Bike 6061 ALUMINUM ALLOY FRAME. FRONT SR SUNTOUR XCT SUSPENSION FORK W/ MANUAL LOCKOUT. ALUMINUM ALLOY HANDLE BAR, STEM, & SEAT POST. PEDALS ARE INCLUDED. SHIMANO ACERA 3-SPEED (FRONT) & ACERA 8-SPEED (REAR) DERAILLEURS. SHIMANO CS-HG2008 8-SPEED FREEWHEEL. SHIMANO FC-TY301 ALUMINUM ALLOY 3-SPEED CRANK SET WITH SEALED BEARING BOTTOM BRACKET. SHIMANO FRONT & REAR DISC BRAKE CALIPER, 160MM STAINLESS STEEL DISC BRAKE ROTOR. KENDA 27.5"x1.95" TIRES. ALUMINUM ALLOY DOUBLE WALL RIMS WITH STAINLESS STEEL SPOKES. MAX. TIRE PRESSURE: 40 LBS. WEIGHT LIMITATION: 200 LBS. QUANDO FRONT & REAR ALUMINUM ALLOY HUBS WITH QUICK RELEASE. 85% PRE-ASSEMBLED. JUST NEED TO INSTALL THE FRONT WHEEL, HANDLE BAR, SEAT, AND PEDALS. THE ADJUSTMENTS OF WHEEL, BRAKES, AND GEARS MAY BE REQUIRED. PROFESSIONAL ASSEMBLY SERVICE IS RECOMMENDED.