When sourcing 700c wheels, you must distinguish between Road, Gravel, and Hybrid applications. For road bikes, prioritize aerodynamics and lightweight materials like T700/T800 carbon fiber or double-walled aluminum alloy. For gravel or trekking, focus on internal rim width (typically 19mm to 25mm) to support wider tires. Ensure the hub compatibility matches your target market, specifically choosing between Rim Brake (9mm QR) or Disc Brake (12mm Thru-Axle) systems, and verify the freehub body type (e.g., Shimano HG, SRAM XDR, or Campagnolo).