Bicycle Short-Crank Length (160-175 mm) Hip-Angle Opener, Gain-Ratio & Pedal-Strike Solver

Deterministic Sagittal 3-bar femur-tibia-crank closed kinematic chain at TDC + Sheldon Brown Gain-Ratio wheel_radius/crank_length & lean-angle pedal-clearance geometry engine (.json, .svg, .pdf) built for Shimano Dura-Ace, SRAM Red AXS, Rotor Aldhu, Appleman Cranks — zero-upload ephemeral Wasm RAM execution.

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