Custom Bicycle Frame Geometry (Stack/Reach), Chainstay Tire-Clearance & Coping Compiler

Deterministic 2D/3D frame kinematic loop + swept tire/chainring envelope vs S-bend chainstay dimple clearance + exact oblique tube-to-cone headtube coping engine (.dxf, .pdf, .step) built for Columbus Tubing, Reynolds, SRAM, Shimano — zero-upload ephemeral Wasm RAM execution.

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