the one witha bulge if its what i think it is, a broken cord, you need to change that tire ASAP with a spare and replace that tire! That is very dangerious to ride on... I broke a cord on my tire yesterday and a few miles down the road my tire blew up and shreded my bumper and my body kit! not to mention it was a pain to try to replace a tire with a leaking spare in the effin soft ground with a busy highway beside you! look up discount tire direct. i think they also sponsor this forum or are just advertised a lot on this forum, they do have cheap deals, and it sounds like u might also want to invest in a slightly smaller tire. the 195 50s and up strain ur car a lot! trust me, I use to counter people on this forum when they said you can't fit 195 50s on ur car with 16''s, because I had them on mine, they caused a great deal of damage, I lowered the size to a 205 40 16. And normaly it isnt a good idea to ride on 2 differnt tires on the same axel, (they also say it on some tires as a warning). the tread isnt the same and can knock ur car off balance given the right circumstances...
-Fix
-Fix