Praxis - Time Trial RingsPRAXIS TIME TRIAL RINGS Praxis TT road chainrings are the result of relentless testing and tweaking, matched with the best material and manufacturing processes to create some of the smoothest running, most durable and sweetest shifting chainrings available. These TT rings are machined from 7075 T6 aluminium and hard anodized for even more durability. They also feature Praxis famous LevaTime Shifting Technology, which boasts synchronized ramps and