Praxis Works Forged Chainring Sets - 64/104mm x 26/38t

All of Praxisworks chainrings are created with our proprietary forging process which allows them to manipulate the ring shape and tooth profile more than ever before. The process also creates a harder and tougher tooth surface for durability. All of these small aggregate features add up to the most durable and consistent shifting rings ever produced for cyclists. LEVATIME ?Praxis's LevaTime shifting is the product of years of relentless testing and tweaking. The final result is a set of some of the finest and fastest-shifting rings available. With a LevaTime ring, several shift pins are placed strategically at points on the ring to provide a perfectly timed lift. Synchronized ramps are tuned with a specific inner ring, providing a clean channel for the chain to move upwards. Each individual tooth is sculpted to handle a specific duty. Along with that, precisely located scallops help control chain movement and prevent chain suck. 36/22 Set You must use a SRAM front derailleur as Shimano front derailleurs are NOT rated for 36/22 combos. If you use a Shimano FD with the 36/22, shifting performance will be affected. A review of the Double Chainring can be seen on this link