Will there be a bigger gap?

[cup_66]

Ive got a 172cup currently has the standard wheels on it(16s)!and im putting some speedline 2118s in 15's on it!now my car has been lowered all round and is sat at the lowest point at the back!so when i put the 15's on its obviously going to sit lower to the ground but is there going to be a bigger gap from the arch to the tyre???

I cant work it out!:S

 

[al]

In a word....yes

 

[black kro]

check actual differece in diameter on:

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