The BBB Bottom Bracket 1Pc 24T Ch-35 is a robust bottom bracket cup set designed specifically for large one-piece cranks. Constructed from durable steel, it ensures longevity and reliability in performance. With a precise 51.5mm cup outside diameter, this bottom bracket offers an ideal fit for your cycling needs. Its user-friendly design allows for easy installation and maintenance, making it a perfect choice for cyclists seeking quality and efficiency.