State Bicycle Co. Undefeated Disc Road Frame & Fork

The Y9-grade aluminum alloy is engineered to be stiffer and lighter than standard aluminum, which translates to a very responsive, snappy feel when you accelerate or climb. Because it is a performance-oriented frame, you will feel the road more than you would on a steel or carbon frame, though the included carbon fork helps dampen high-frequency vibrations.

The frame accommodates tires up to 32 mm wide. While 32 mm is the maximum, we recommend running 28 mm tires for the best balance of speed, comfort, and handling on this specific geometry.

Yes, this frameset uses a PF BB86 bottom bracket standard. Ensure your crankset and bottom bracket components are compatible with this press-fit system before beginning your build.

The tapered head tube increases the surface area at the front end, which significantly improves steering precision and stiffness. This design reduces flex when you are cornering hard or sprinting out of the saddle, giving you more confidence in the bike's stability.

The package includes the Y9-grade aluminum frame and the full carbon fiber fork with a carbon steer tube. You will need to source your own headset, bottom bracket, and other drivetrain components to complete the build.

While it is designed primarily for speed and responsiveness, it can certainly handle longer rides. However, keep in mind that its geometry is aggressive and performance-focused, so it may feel less forgiving than a dedicated endurance bike over very long distances.