Amazon.com: KAKO Shifter 3x7 Speed Shifter Brake Lever Combo 21 Speed Shifter Set and Brake Levers with Inner Cables Compatible with Bicycle Mountain Bike : Sports & Outdoors
MTB Shifters on Drop Bars - YouTube
Surly solves the issue of MTB controls with drop bars | BikePerfect
SHIMANO ST-EF41 3x7 21Speed MTB Bicycle Bike Shifters Set Trigger Shifter Brake | eBay
Amazon.com: microSHIFT TS71-8 MTB 3X8 Speed Shift Bike Shifter Conjoined DIP Compatible for Shimano,TS70-8