Premium Shimano Bicycle Components Bundle: BB-RS501 Hollowtech II Bottom Bracket & Tiagra FC-4703 10-Speed Crankset Optimize your bikes performance with this high-quality Shimano components bundle featuring the Shimano BB-RS501 Hollowtech II English Bottom Bracket and Shimano Tiagra FC-4703 10-Speed Crankset. Designed for discerning cyclists seeking durability, precision, and lightweight engineering, this combo enhances ride quality across road and mountain bikes alike. **Shimano BB-RS501 Hollowtech II English Bottom Bracket** Constructed with high-strength anodized aluminum cups, the BB-RS501 boasts an advanced sealing system that ensures long-lasting performance and resistance to dirt and moisture. Specifically engineered for English-threaded bottom bracket frames, this bottom bracket seamlessly integrates with Hollowtech II 24mm crank spindles for a secure, precise fit. Its lightweight yet durable design makes it ideal for riders demanding efficiency and reliability. With a shell width of 68mm and a shell ID of 1.37 inches, the silver-colored BB-RS501 is a perfect upgrade for various mountain and hybrid bikes, supporting enhanced pedaling power and smoother rotation. **Shimano Tiagra FC-4703 10-Speed Triple Crankset** Engineered for road cyclists seeking a versatile and lightweight drivetrain, the Tiagra FC-4703 crankset features a rigid aluminum construction with anodized finish for enduring style and corrosion resistance. Its integrated 24mm axle decreases weight and improves rigidity, translating to better power transfer during climbs and sprints. This crankset comes with a 50/39/30T triple chainring configuration, 110mm/74mm BCDs, and a 45mm chainline, optimized for 10-speed Shimano drives. The 170mm crank arms, combined with a 158.8mm Q-factor, deliver a comfortable, efficient riding stance suitable for endurance and sportive cycling. Compatible with Road and MTB hubs, this crankset supports versatile use cases with a sleek gray finish for style and performance. **Perfect for upgrading your cycling setup or building a custom bike, this Shimano component bundle combines engineering excellence, lightweight materials, and innovative technology for superior durability and ride quality. Whether upgrading your mountain bikes drivetrain or enhancing your road bikes performance, these Shimano components deliver reliable performance, easy compatibility, and stylish design.** **Optimize your cycling experiencechoose Shimano for precision, durability, and performance.**