Chains & Sprockets for 2018+ Harley M8 Motorcycles. The 2018+ M8 Chains & Sprockets collection at TC Bros embodies the spirit of custom innovation and rugged performance, delivering the drivetrain upgrades your Milwaukee-Eight-powered Harley demands. Featuring heavy-duty drive chains, precision-machined sprockets, and complete conversion kits, these products are built to withstand the torque of models like the Softail Street Bob, Fat Bob, and Low Rider. Designed for those who value reliability and the bold style of custom builds, these components ensure smooth power delivery and unmatched durability. TC Bros’ legacy of unique chopper and motorcycle craftsmanship shines through in every product, letting you create a bike that’s as powerful and distinct as your vision.