03 Machs with stock Gatorbacks (245/45/17)

i like the looks of the wheels with this style

my speedometer is 5MPH slow @ 60

i need bigger sidewall and springs and it would be better, what size of tire would i need to get back to stock rolling diameter?

anyway here are some pics







here is showing the offset differnce




this quick shot doesnt look all that bad....the car was parked uneven tho

 

get some 255/50/17's
nice rims too, looks perfect.

 

Looks good. Mineral Grey is a beautiful color!!

 

very sweet I love the mach rims on 05s

 

Nice ride and the new rims look great!

 

SaweeT, Chad. Mach 1s on the '05 are the nicest combo IMHO.

 

Try these

http://www.miata.net/garage/tirecalc.html

http://www.1010tires.com/TireSizeCalculato...p?action=submit