You should have no problems with the tires, but I always like to check to see if my rim width is going to be in an acceptable range for the recommended tire size. The recommended rim size for a 205/70 is 5.0 - 7.0 inches and the recommended rim size for a 225/70 is 6.0 to 7.5 inches. As long is as your rim size falls with in that range you should be good. Using rims wider or narrower rims then recommended could produce bad results. Also your rim size will dictate how the tire looks on the wheel.

I always use the Radial T/A tire chart found on the BFG site to compare sizes, heights and rim widths. Although other charts may vary based on tread pattern, the other specs remain pretty much the same. The one I use is at: http://www.bfgoodrichtires.com/specs/radial-t-a/12.html