MT 275/60/15 ET Radials

So I would probably be better with the 255/60/15
Here is the info on it:

Part: MT3756R
Size: P255/60R15
Lettering:
Serv Desc:
Weight: 30
Max Load:
Approved Rims: 7.0-9.0
Measuring Rim: 7.5
Sidewall Width:
Tread Width: 9
Overall Diameter: 27.1
Suggested Tube:
Compound: R2
Circumference: 85
Tread Depth:
Size Equivalent: 27 X 10.50R15
Load Range:
Max PSI:


Right now the car has small bolt pattern Cragars on it with a set of brand new MT Indy profile l60-14's on a 14x10 wheels on the back and a pair of 14x5 cragars on the front.