Tires & Tubes for Metric Motorcycles. The Metric Tires & Tubes collection at TC Bros is designed for riders and builders who demand durability, performance, and style from their custom motorcycles. This category features a selection of high-quality tires, inner tubes, and accessories built to handle the road and complement your bike’s look. Perfect for models like Yamaha XS650, Honda CB750, and other metric classics, these products are available in a variety of sizes and tread patterns to suit your chopper, bobber, or cafe racer. With TC Bros’ focus on craftsmanship and rebellious design, this collection ensures your bike delivers both attitude and top-tier performance.