Garbaruk Chainring Features:- Special Tooth Shape Guarantees A Tighter Contact With Chain And Softer Pedaling (In Comparison With Regular Chainrings)- Chamfered Edges And Wide Mud Gap Keeps The Ring From Getting Muddy- Increased Tooth Height Improves Chain Retention While The Bike Is Shivering And Jolting- Overall Bicycle Weight Reduction In The Range Of 150-400 Grams (With No Front Derailleur And Chainguide)- Manufactured Using Highly Durable Aluminum Alloy- Variable Teeth Thickness Prevents Chain DroppingOval Chainring Advantages:- Even At-The-Wheel Distribution Of Pedaling Torque- Improved Responsiveness And Pedaling Smoothness, Narrower Dead Spots And Increased Span Of Your Gluteus And Hamstrings- Easier Uphill Riding, Especially On Soft And Slippery Terrains- Increased Pedaling EfficiencySpecifications:- Model: 38t- Offset, Mm: 2.8 (38t-54t)- Made From: 7075-T651 Aluminum Alloy- Surface Coating: Anodizing- Made With: Cnc Milling- Ovality: 12%- Timing: 108° After Tdc (Top Dead Center)- Compatible Cranksets: Sram Red/Force Axs- Weight, Grams: 66 (38t)- Chain Compatibility- 10/11/12-Speed Chains : Including Shimano Hg+ And Sram Axs Flattop Chains