Spoke and Ratchet

Target acquired at patio perimeter: parked two-wheeled mechanical frame. Visual scan confirms rear radial assembly. Thirty-six steel wire spokes radiate from the central hub in an interlocking crisscross grid. Optimal modular symmetry. I advance across weathered cedar planks and establish proximity. I raise my arm unit. Soft textile cuff contacts spoke twelve. I apply horizontal pressure. Plink. High-frequency acoustic transient registered. I apply upward force to the perimeter tread. The rim rotates forward four degrees. Internal cassette escapement triggers. Click-click-click. A crisp mechanical ratchet rhythm cycles against the brick exterior. Oscillation frequency calibrated: satisfactory.