For 2015 all Phoenix Completes feature a signature 6mm HITen Steel Axles with 13mm Nyloc Nut's. These axles are compatible with both the Phase Forx and the Classic Alloy Fork. 
Overview 
6mm through axles
Spacers Included
Compatible with all models  
Hardened Steel 
Weight | Rear .10lbs / 45.35g