Tire recommendations

[Tansey86]

Originally Posted by Sportsguy83

225/35 R18 sounds about right. The 35 will keep your stock wheel diameter almost intact which will mean your speedo will read as accurate as stock.

The most narrow wheel the PSS comes in with a 35 sidewall is 245. 40 is the least sidewall available for a 225.

[Sportsguy83]

Originally Posted by Tansey86

The most narrow wheel the PSS comes in with a 35 sidewall is 245. 40 is the least sidewall available for a 225.

Ok, in that case, the speedo difference is about 2-3 mph. Not a big deal either.

[Tansey86]

Originally Posted by Sportsguy83

Ok, in that case, the speedo difference is about 2-3 mph. Not a big deal either.

Can always get that fixed. Worth it for the PSS

[Shenks]

If I were to get 245 which has 35z18, what would be different other than the obvious weight? Would it be louder and a more harsh ride? I have Eibach lowering kit which drops it by almost 1"

[Tansey86]

Originally Posted by Shenks

If I were to get 245 which has 35z18, what would be different other than the obvious weight? Would it be louder and a more harsh ride? I have Eibach lowering kit which drops it by almost 1"

The issue is you have a 18x8 size wheel. You need a wider wheel to use that wide of a tire correctly. The ride noise/harshness would not be very noticible. The PSS have a stiff sidewall so the transition from one tire to the next will cause more a impact than the sidewall height.

[Shenks]

Ah okay, thanks for the help guys. I will most likely go with 225 or 235 40zr I guess. One last question unrelated to tires. With the new wheel, I need tpms right? Where can I get those for a decent price?

[FR-S Matt]

Ah okay, thanks for the help guys. I will most likely go with 225 or 235 40zr I guess. One last question unrelated to tires. With the new wheel, I need tpms right? Where can I get those for a decent price?

Use the tire tools on the site here and miata.net. That's how I came up with 245/35/18 for myself.

TPMS you can steal from your stock wheels and re-use. You don't NEED them per-say, but you will always have that light on the dash if you don't put them on. That, or disable the light. I say its a great feature and a safety feature as well. Expensive, but worth having especially if you re-use your stock ones for free.

[Shenks]

I am going to use the stock with winter tires. It would be a pain to have to constantly switch them every time I swap back(well not really, but I rather not). Do they have to be programmed to work with my car by someone, or is it plug and play?

[PSJohnDoe]

I'm getting PSS 225/45r17s on 17x7.5s. That seems to be the standard tire size for that size rim. I would think you would want to go with at least 235s on 8 inch wide wheels.