Sram sl 1090 aero tt shifterthe sram sl 1090 aero tt shifter bring you the same high quality and high speed shifting that is enjoyed by motorsport drivers ideal for triathletes and time trial enthusiasts the sl 1090 shifter is equipped with srams r2c return to centre feature which allows you to start in your best aerodynamic position and stay there this is because after every shift the shifter immediately and automatically returns to the starting centre theres no need to bend your han