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Red lights, stop signs, blind intersections, and unsuspecting riders are constantly testing your fast-twitching muscles - your bike needs to react as quickly as you do. Track cycling also requires a lot of hard, high-force exertion, so stiffness is important to maximizing your performance - you need cranks that respond to a surge of force that gets you instantly into a sprint. The 100% CNC-milled 3D24 TRACK was specially manufactured with a shorter axle and 144BCD especially for rail and fixed-gear bikes. The 3D24 track crank continues to lead the market for 24mm track cranks in terms of technology and performance.