This is a carbon fiber frame. Super light bike 27 5+ tires carbon fiber wheels eagle drive train carbon, fiber crank. EAGLE SX shifters. EAGLE XO rear cassette this upgrade saves a great deal of weight. 140 mm of travel in the front fork with the plus tires makes this a super versatile, hard tail. You can ride most terrain and save a ton of weight and cost over full suspension.Dropper seat post. Retails for 4000 closing out my inventory will sell it for $1900.00 has a few scratches on frame.