2018 Gravity FSX 1.0 Dual Full Suspension Mountain Bike with Disc Brakes, Shimano Shifting (Black, 21in) Disc Brakes Front and Rear, Strong and Durable Aluminum Frames Easy to Use Shimano Shifters Adjustable Suspension - Front and Rear! Strong and Light Double Wall Rims, Quick Release Wheels - Front and Rear No Sellers can ship fully assembled bikes. Assembly Required