I am going to purchase a new set of drag radials in the very near future and I am having a problem finding the correct size tires. My 91 Stang factory Tire Size is 225-55-16. I have been unable to locate this size in a drag radial. Will the 245-50-16 Nitto 555R Drag Radial work... What would the difference be in the two sizes. Will my speedo be off and will the tire fit on Pony 5 Star rims. Also BFG has a 255 50 R 16 Comp/TA Drag Radials. Will these fit with out any problems... If you can think of any other tires that might work please let me know. I race at the track about once a month and on the street more.