CeramicSpeed OSPW X- Shimano GRX/Ultegra RX 2XThe CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design. Features 13 tooth upper and 19 tooth lower, aluminum pulley wheels with Grade 3 Silicon Nitride balls Robust cage crafted from polyamide and carbon fiber for durability and light weight Coated bearing races increase bearing service life by increasing hardness of race

a pad spreader spring

Standardized for 1 size fits all applicable models

BB/Frame Interface: T47

Welded seams also create a clean finish on both the interior and exterior of the bag

Reach adjustment and customized button functions allow you to dial in your ideal ergonomics

A short-nose bike saddle that combines a ride-compliant carbon-reinforced nylon shell and Kium hollow rails offering a high strength-to-weight ratio

Saddle Cut Out: No

Tallboy AL 2

but it also contemporizes the look of your super bike

cradles your foot securely

Riding involves easy transitions from standing or sitting

Zipp takes a different approach