i'm looking to get a set of 19" wheels for my sedan, the rears will be 19x9.5 and the fronts will 19x8.5, the tires i'm thinking of getting are toyo t1s 275/35/19 rear and 245/35/19 front, is this correct or should i go for 275/30/19 for the rears ?

according to this tire size calc :
http://www.miata.net/garage/tirecalc.html
for the 275/35/19 the diameter will be .3 larger and 1% to slow on the speedo
for the 275/30/19 the diameter will be .8 smaller and 3.1% to fast on the speedo

i'm thinking 275/35/19 because i think that it will help the ride a bit and protect the rim a bit more, any feedback anyone, thanks


G35s
z-tube, jwt popcharger
coupe mid-pipe
clear corners