TRP offers a selection of brake lever adapters to mount your shift or dropper directly to the brake lever. TRP brake levers are offered in two configurations. To select the correct brake lever adapter: Find your brake set below, Note either I-Spec II or I-Spec B Select either I-Spec II or I-Spec B above. Select the shifter or dropper mount you would like to convert to. TRP I-Spec II Brakesets: DH-R (HD-M846, HD-M845, HD-M841), Trail (HD-M843, HD-M825, HD-M817, HD-M815), C2.3 (HD-EU835, HD-EU832, HDEU831, HD-EU830, HD-EU818,HDEU817, HD-EU816, HD-EU815) E-MTB (HD-E842. HD-E840-2) TRP I-Spec B Brakesets: Slate (HD-M805n, HD-M806, HDM807), Quadiem (HD-M835, HD-M830), Zurich (HD-E820, HD-E822, HDE824) *Brake levers not included