Gravity Bullseye Monster 26-Inch Fat Bike Frame Kit

The Gravity Bullseye Monster is a fat bike frame and fork kit aimed at DIY builders who want to assemble a capable fat-tired bicycle from the ground up. The frame is constructed from 6061 aluminum alloy, striking a balance between strength and weight that is well-suited to the demands of oversized tires and off-road riding. It features disc brake mounts, a replaceable rear derailleur hanger, water bottle bosses, and rear rack braze-ons on the seatstays, giving builders options for accessorizing down the line. The 170mm symmetrical rear spacing is purpose-built for fat bike hubs, ensuring proper clearance for 26 x 4.0-inch tires.

The included fork is a rigid chromoly steel unit with a threadless 1 1/8-inch steerer and 135mm front spacing. While it does not offer suspension, CrMo steel naturally dampens trail vibration better than aluminum, and the rigid design keeps the front end simple and maintenance-free. What sets this kit apart from a bare frame is the extras: the headset and stem come pre-installed, and a seatpost and seatpost clamp are included in the box. This means builders can focus their additional budget on wheels, tires, a drivetrain, and brakes rather than small but essential cockpit components. For riders interested in snow, sand, or loose-terrain riding without a premium price tag, the Bullseye Monster provides a solid foundation to build on.