Shimano Ultegra ST-R8020 Shifter Only (Disc Brake) General The parallelogram's 2D trajectory is

The parallelogram's 2D trajectory is specifically designed for the Ekar 1x system

Shimano PD-R9100

giving you the high performance and long life you expect from a Thomson

keeping you riding smoothly through rain

Shimano Ultegra ST-R8020 Shifter Only (Disc Brake) General The parallelogram's 2D trajectory isThe SHIMANO ULTEGRA R8020 series shifters bring greater rider control in all conditions thanks to SHIMANO's category leading hydraulic disc brakes. Lighter front shift action and refined ergonomic shape sweeten the deal. Specifications Left or Right Mechanical Shifter (Choose from drop down menu) Hydraulic Disc Brake Specific Does not include any calipers, cables or fittings. Mfr Claimed Weight TBC