195/50 is the better choice, 45 profile will affect the gearing and speedo.
there's a 5.12% difference in rolling radius, the very max should be 2.5% (and ideally 1%).... your speedo will miss read by about 10-12mph!
yeah I see now.. a bit weak looking. 50 195 it is. I've got 2 sets of long beach, 195 55 and 205 50! need to get it right ha