Why your Shimano Ultegra shifter doesn't work. | Troubleshooting for Shimano Ultegra ST-6700 10 speed shifter. | By Cycling & Mountain Biking | Hello friends, it's been a while today, Shimano Ultegra.
![gearEleven International: Shimano Ultegra STI Dual Control Shifters ST-6700 2x10 speed compatibility and specifications gearEleven International: Shimano Ultegra STI Dual Control Shifters ST-6700 2x10 speed compatibility and specifications](https://1.bp.blogspot.com/_ZtSLQa6nzkE/TNC4BrR4DpI/AAAAAAAAAVM/eUAVG79yTa8/s1600/shimano-st-6700-gear11-japan.gif)
gearEleven International: Shimano Ultegra STI Dual Control Shifters ST-6700 2x10 speed compatibility and specifications
![Hi! I have these Ultegra 6700 shifters and a Deore 9 speed rear derailleur. They work fine, but they "lose adjustment" pretty easily. I'm thinking about upgrade into this Shimano GRX RD-RX400 ( Hi! I have these Ultegra 6700 shifters and a Deore 9 speed rear derailleur. They work fine, but they "lose adjustment" pretty easily. I'm thinking about upgrade into this Shimano GRX RD-RX400 (](https://i.redd.it/lgvgl68esbj71.png)
Hi! I have these Ultegra 6700 shifters and a Deore 9 speed rear derailleur. They work fine, but they "lose adjustment" pretty easily. I'm thinking about upgrade into this Shimano GRX RD-RX400 (
![Shimano Ultegra 6700 Shifters 10x2, Sports Equipment, Bicycles & Parts, Parts & Accessories on Carousell Shimano Ultegra 6700 Shifters 10x2, Sports Equipment, Bicycles & Parts, Parts & Accessories on Carousell](https://media.karousell.com/media/photos/products/2020/6/28/shimano_ultegra_6700_shifters__1593342605_d7742ab4.jpg)