Selecting the frame material depends on your target market's price point and quality requirements. Steel frames are cost-effective and highly durable, making them ideal for budget-conscious retail, though they are heavier. Aluminum alloy frames are significantly lighter and rust-resistant, which is a major selling point for premium brands as they are easier for children to handle. For high-end performance markets, magnesium alloy offers a seamless, ultra-lightweight design with superior shock absorption.