Guided by the principle of "if you're going to upgrade, do it thoroughly," CT performs a top-tier drivetrain upgrade on his bike. The video focuses on the renowned CeramicSpeed (CS) OSPW oversized pulley system and ceramic bearing bottom bracket (BB), along with the iconic TIME XPRO flagship carbon pedal. From disassembling the rear derailleur arm, assembling the oversized pulleys, to pressing in the BB and adjusting the pedals, the video fully showcases the precision craftsmanship and installation tips of each component. Close-up shots highlight the astonishingly smooth free-spinning after the upgrade. How many precious watts can this high-end ceramic system save the rider on real roads?