RaceFace Turbine Ringset 104x 64 22/32/44 TruVativ Fit New asymmetrical tooth profiling and more upshift and downshift zones yield instantaneous smooth and quiet shifting, even under load Three times stiffer than our previous Team chainrings without any weight gain. Net result is much sharper, quicker and more responsive shifts as well as increased resistance to impacts Machined in Canada from US made aluminum