A Single Chainring With A Wide-Range Cassette Is A Wonderfully Clean Way To Tackle So Many Disciplines, And We'Re The 1x Leaders. Gravel, Tt, Tri Or Crits: Just Pick The Right Chainring Size For The Discipline And Go. Our Lightweight And Strong Direct Mount Chainrings Feature X-Sync Tooth Technology To Maximize Chain Retention, And They Bolt To Carbon Arms With A Spectacular But Subtle Finish. Crankset Force 1x D2 Dub - Unicorn Grey W/Laser Foil - 175mm Direct Mount 40t. Features:- Direct Mount Chainrings Are Lighter And Stiffer Than Traditional Spider-Based Rings- 48t And 50t Variants Have Direct Mount Aero Chainrings For Better Aerodynamics- Sram X-Sync Wide-Tooth, Narrow-Tooth Chainring Technology Provides Maximum Chain Control- Dub Bottom Bracket Adds Durability And Simplicity- Can Be Upgraded To A Power MeterSpecifications:- Speeds: 12- Bb Compatibility: All Sram Road Dub Bbs- Chainring Size: 40t- Crank Arm Length: 165mm, 167.5mm, 170mm, 172.5mm, 175mm, 177.5mm- Bb Spindle Interface: Dub- Chainring Material: Aluminum- Bolt Circle Diameter (Bcd): Direct Mount (Dm)- Crank Arm Material: Carbon