Navi R240 Hardtail Aluminum Alloy Frame, ZOOM Disc Brakes, Shimano ACERA 24-speed, 26" Wheel Mountain Bike (BLACK / NEON GREEN) 6061 ALUMINUM ALLOY FRAME. FRONT MOZO SUSPENSION FORK W/ MANUAL LOCKOUT. ALUMINUM ALLOY HANDLE BAR, STEM, & SEAT POST. ALUMINUM ALLOY PEDALS ARE INCLUDED. 24-SPEED. SHIMANO ACERA ALUMINUM ALLOY 42T/34T/24T*170mm CRANK SET. SHIMANO FD-M190A-6 ALTUS 3-SPEED FRONT DERAILLEUR. SHIMANO RD-M360 ACERA 8-SPEED REAR DERAILLEUR. SHIMANO ST-EF51 LEVER SHIFTER W/ INTEGRATED BRAKE LEVER. ZOOM DB-320 FRONT & REAR CABLE DISC BRAKES.ZOOM 160mm STAINLESS STEEL ROTORS. FRONT & REAR QUANDO ALUMINUM ALLOY HUB W/ QUICK RELEASE. CST, 26"*1.95" TIRES. ALUMINUM ALLOY DOUBLE WALL RIMS. MAX. TIRE PRESSURE: 40 LBS. WEIGHT LIMITATION: 200 LBS. 90% PRE-ASSEMBLED. USER JUST NEED TO INSTALL THE FRONT WHEEL, HANDLE BAR, SEAT, AND PEDALS. THE ADJUSTMENTS OF WHEEL AND BRAKES MAY BE REQUIRED. PROFESSIONAL ASSEMBLY SERVICE IS RECOMMENDED.