Yeah it is, my bad on the wording, it just isn't as common with the 105/Ultegra/DA stuff. They use a plastic piece in the Tiagra and lower shifters that they don't use in the higher up stuff and it breaks and usually happens suddenly with no real warning. Just a left lever, and this is an r500 shifter not a tiagra is $160. A pair of Tiagra shifters is $320. The thing that really screws you is it being 9 speed. They only make 2200/sora/tiagra in 9 speed anymore, shimano is smart like that.