Originally posted by jedi_rider
So, again, I may get the Ultegra 12-25---or---sigh---maybe consider getting the Tiagra 13-25 which has the 16t cog. Any issues with this fitting on my Ultegra setup with SRAM chain?
You can get 13-25 in 105 or Ultegra too. Not every retailer carries them but they are definitely available so you may have to search them out or special order from an LBS. Not sure if available in D/A.