hughes412

I have the sedan lx and I am putting on 17x7s and it said that the tire size to go with 205-45-17, but I thought the transmision in our cars were the same! So if I go with the 17s like the MSP shouldn't I run the same size tire? I personally would like a wider tire (205-45-17) but dam they get pricy. And isn't going to the 215s gona make my speedo off! SO, has anyone done this and what do ya think?
Thanks
Bryan

goldstar

Go to: www.miata.net/garage/tirecalc.html

The OEM wheel/tire size is 195/55-15 on the LX. It looks like your best match in terms of minimal speedo error would be: 205/40-17.

rustychops41

Definitely get the 40 series. The 215/45-17 the MP3/MSP uses is nearly an inch taller than your OEM tire, which is like gearing your final drive much taller (=slower!). The 205/40-17 is nearly a dead-even match for your 195/55-15's in overall diameter. Even so, expect a much harsher ride over small pavement inperfections, and a little bit slower acceleration with the larger wheels due to rotating mass, regardless of your tire size choice.