The Undefeated II was designed from the ground up to be the perfect tool for mastering Fixed-Gear Crit Races. The frame is built with Double Butted 7005 Aluminum to maximize strength and minimize weight and features an oversized tapered headtube for additional stiffness. The Essor USA Full Carbon Fork delivers superior handling and responsiveness.The Undefeated II complete build features premiere, competition-grade components. The Essor USA Aerodash Crankset is built with 7075 aluminum and uses an external bottom bracket to ensure maximum power transfer, while the seamless construction promotes smooth airflow over the crank for greater aerodynamics. The Essor USA Bolt v2 Wheel Set features a large cutout flange design on the hubs to improve stress distribution while also reducing weight, making the wheelset light enough for competition and durable enough to take a beating on the streets. Compact Drop Bars round out the complete build by providing comfort and quick transitions between hand placements.Our most responsive and powerful machine yet boasts nothing but premiere parts and components, making the Undefeated II the favorite track in track and fixed-gear racing. Frame 7075 Aluminum, Double Butted, T6 Heat Treated, 1 1/2" to 1 1/8" Tapered Headtube Fork Full Carbon Fork and Steerer, 1 1/2" to 1 1/8" Tapered Steerer Wheels 700c Aluminum Wheel Set, Mid Profile Rim Depth: 30mm Hubs Sealed Bearing, Flip-Flop Hub, Spacing: F: 100mm / R: 120mm, Bolts: F: M9 / R: M10 Spokes 14G, 1 Cross Pattern Tires Michelin Dynamic Sport, 700c x 23, Suggested Max Tire F/R: 25mm / 28mm Bottom Bracket BSA Bottom Bracket, English Threaded, 68mm Crankset Forged 7075 Aluminum, Crank Arm Length: 170mm Chainrings Forged 6061 Aluminum, 48T, 144 BCD Cassette/Freewheel 16T Freewheel and Fixed Cog Chain KMC Z710 Brakes Dual Pivot, Forged Alloy, Clamp Diameter: 24mm Handlebars Aluminum, Width: 420mm, Drop/Reach: 130mm / 75mm Stem Forged Aluminum, Clamp Diameter: 31.8mm, Length: 90mm, Rise: +/- 7° Headset FSA #42 ACB Seatpost Aluminum, Diameter: 31.6mm, Length: 350mm Saddle Polyurethane, Steel Rails Pedals Sold separately