Praxis 2X forged road chainrings are the result of relentless testing and tweaking, matched with the best material and manufacturing processes to create some of the most durable and sweetest shifting sets available. All other aftermarket rings are machined. For superior longevity and performance, we cold forge ours from 7075 T6 aluminum and hard anodize it for even more durability. They also feature our famous LevaTime Shifting Technology, which boasts synchronized ramps and strategically placed shift pins for perfectly timed shifts every time. 10/11sp Buzz Sport: For both 5-arm AND 4-arm w/hidden 5th (like SRAM Exogram) Weight Ref 52/36 : Buzz Sport 198g set Includes a long & short replaceable threaded catch pins Cold Forged | Hard Ano 7075-T6 Aluminum | Long & short replaceable threaded catch pins At this time not Sram AXS chain Compatible Great for use with Di2, EPS, or eTap shifting systems