![The C//C frame features a replaceable insert which contains the threading for the 12mm thru-axle, eliminating the chance of damaging the frame by cross threading. Lance Haidet's 2018 RenoCross Donnelly C//C Cyclocross Bike. © C. Lee / Cyclocross Magazine](https://www.cxmagazine.com/wp-content/uploads/2018/10/haidet-donnelly-c-c-renocross-155-ed-cxmagazine-clee--1280x853.jpg)
The C//C frame features a replaceable insert which contains the threading for the 12mm thru-axle, eliminating the chance of damaging the frame by cross threading. Lance Haidet’s 2018 RenoCross Donnelly C//C Cyclocross Bike. © C. Lee / Cyclocross Magazine