Aluminum alloy remains the most cost-effective choice for B2B volume, offering a balance of weight and strength. However, for premium segments, carbon fiber (T700/T800) is gaining traction due to its high strength-to-weight ratio. To optimize costs, consider SKD (Semi-Knocked Down) shipping, where rims, hubs, and spokes are shipped separately to reduce volume, though this requires local assembly capabilities. Bulk discounts typically trigger at 500+ units, potentially reducing unit costs by 15-20%.