XX1 Eagle Hollowpin 12-Speed Chain Mountain Bike Castelli calls it the Pioggia

Castelli calls it the Pioggia Shoecover

The Neo 2T doesn't require an external power source as it generates its own energy from your cycling movement

a 32mm wrench

Pack up your gear

XX1 Eagle Hollowpin 12-Speed Chain Mountain Bike Castelli calls it the PioggiaIt might look normal from the outside, but the engineering inside this incredible new chain design is anything but normal and it makes possible a gear range previously found only in 2 chainring drivetrains. And its also the biggest contributor to the Eagle drivetrains ultra smooth, precise, durable and quiet performance. The Eagle chains links have a smooth radius, with no sharp edges or chamfers, which yield a significant reduction in noise, friction