Trek’s premium aluminum alloy, Alpha Red is ZR9000 or 7000-series aluminum that has been hydroformed or mechanically formed into sophisticated tube shapes with optimized butting profiles for maximum strength and minimum weight. Alpha Red frames may be smooth welded for aesthetics.

Trek’s high-performance aluminum alloy, Alpha Black is 6000-series aluminum that has been hydroformed or mechanically formed to optimize the tube shape and butting profile. Alpha Black frames may be smooth welded for aesthetics.