I have a fairly old Specialized Hardrock Sport.
I want to get new derailleurs. Is there a specific one I should get. I'm not sure the one now is the original.
I have a fairly old Specialized Hardrock Sport.
I want to get new derailleurs. Is there a specific one I should get. I'm not sure the one now is the original.
It looks like Specialized built bikes with that name from 1993-2010. A lot changed over that time.
In the last year the bike was produced, it had a triple crankset (and presumably before). Triple chainrings are less popular these days, so your choices for a front derailleur will be limited.
For the rear derailleur, you'll need to find something compatible with A) the shifter, and B) the number of sprockets. This will come down to the derailleur's "cable pull ratio," and without knowing more about your specific bike, it's not possible to make a recommendation. Even with that information, it may take some archeology to dig up the right answer.
What is the specific problem you hope to solve by getting new derailleurs? There may be a different solution.