The prime 9 components are optimised for 11-50t cassettes without all the headaches of adjusting 12 gears

The ZS headsets are for frames with internal bearing cups that are pressed into the frame

14% Spandex

Ventilation: The exact number of vents isn't stated but there are a bunch of nice big vents

6mm Chainring bolts needed

Fox Launch Pro Elbow Guards - XL PLP|Colour The prime 9 components areKPU skid plate on Cordura front panel for abrasion resistance Extra wide elastic upper band with silicone gripper for security Increased ventilation Slip on construction with hook and loop adjusters CE certified D3O insert and removable internal hardcap Meets EN1621 1 Level 1 CE requirements with or without the hardcap in place