What is the bestcombo of wheels and tires i can get that stay the closest to the correct speedometer readout?

Requirements for this combo:

-I want a wheel that clears a big brake kit i plan for later. Maybe a set of stoptech's or something.
- The tires must also clear the inside suspension as i plan for a 3/4 to an inch drop.
- Im also looking for a wide tire and decent size lip on the wheel for an agressive stance.

I have no clue what to look for with all these characteristics in mind. Any suggestions or places to look would be appreciated.

Main concern is that the speedo stays closest to correct as possible. Thanks!

 

You can use the calculator here http://www.miata.net/garage/tirecalc.html
to try out different combinations and it will tell you the % difference so you can see by how much the speedometer will be affected.

 

i know going from a 205 55 r 16 to a 225 40 r 18 only changes the speedo about .5 mph. you dont want to go more than 8.5 wide either if your lowering. could cause some rub. this link may also help http://www.discounttiredirect.com/di...TireMathNS.jsp