What exactly happens to a bike that is put through one million feet of descending in just fifty seven days? We inspect Adam Billinghurst's Trek Session 9.9, complete with prototype BoXXer fork internals, to find out.

We get up close with the downhill legend's Canyon Spectral.

FOX travelled to Sedona, Arizona, to let us spend the day on their prototype RAD 34 fork, a unit that's usually reserved for their fastest racers.

Specialized's Brandon Sloan talks to us about sag and its importance for getting the most out of your ride.

There are at least two schools of thought on the subject. How would you weigh in?