Park Tool SPA-1 Bottom Bracket Pin Spanner

Mountain bikes are built for tackling rough terrain with frames made of durable materials like aluminum or carbon fiber, ensuring stability and maneuverability. They feature suspension to absorb impacts from rocks, roots, and drops, providing a smoother ride.

Urban/Commuter bikes are purpose-built for navigating city streets with comfort and practicality in mind. Featuring frames designed for easy mounting and dismounting, often made of durable steel, these bikes prioritize reliability and ease of use with components like internally geared hubs or single-speed drivetrains for low maintenance.