Material and geometry
Request the proposed material and construction description, dimensioned drawing and revision. List wheel size, axle spacing, head tube, seat tube, brake mounting and battery enclosure interfaces that require confirmation. Ask the supplier to mark deviations rather than returning a generic catalog drawing.
Test scope and conditions
Ask what exact-item test evidence is available, what configuration was evaluated and which conditions apply. Identify manufacturer, model and report revision. Frame evidence does not establish battery, charger or complete-system approval; an unfamiliar document needs appropriate specialist review.
Sample and pack record
Define the sample finish, included mounts, protective packing and intended inspection. Compare measured dimensions to the approved drawing and record differences. Ask for carton dimensions, gross weight and pack ratio for the actual frame or complete-bicycle shipment; sample packing may differ.
Commercial and shipment scope
Separate frame tooling, finishing, sample charges and production pieces. Battery capacity or motor/controller ratings belong in a complete-bicycle scope when applicable. Ask for the transport configuration and destination assumptions; a frame-only quote must not be compared directly with a delivered bicycle set.
This is a decision worksheet, not a price or performance comparison. A lower-complexity option may suit a standard assortment; a custom design may require additional approval work.