18" rims

[Topgun]

Does anyone know about any problems with putting 18" rims on my mazda 3s?

 

[tsunami]

shouldn't be any, if you are lowering your car as well as putting on 18s (generally 7 or wider) i would make sure you have an offset of at least +45mm bigger if you can find it... otherwise just match your overall outside diameter (od) with your stock wheel/tire set up (so your speedometer will be correct) and you will be fine...

 

[JOS3]

since stock size is 205/50/17, go with a 205 or 215/40/18 and you should be fine

 

[goldwing2000]

since stock size is 205/50/17, go with a 205 or 215/40/18 and you should be fine

205/40-18 would be too small. If you go with a 205, it will have to be a 45 profile. There's no 215 that is the right size but a 215/40 is closer than a 215/45.
If you want to go with a wider tire, the best bet is a 225/40-18. That's exactly the same diameter as a 205/50-17.

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

 

[ZoomVT]

yup 225/40/18 is exactly the same and its damn sweet!

 

[Airman Jack]

hey zoom is that the same size of Khumo's you put on your KZ-A's? are they the 7.5" wide rims?

 

[ZoomVT]

hey zoom is that the same size of Khumo's you put on your KZ-A's? are they the 7.5" wide rims?

yeah those are the same. they fit snug, well except for the negative camber...