Hey guys,

I got a set of rims in the mail yesterday and going to need to order tires in the next few months.
Front: 18x8.5 + 35
rear: 18x9.5 + 35

Tires im thinking about

215/40/18 in the front
235/or 245/or 255/35 in the rear.

I'm pretty sure the 235/35 will fit with ease with fender roll and maybe a little camber. I'm wondering if i put a 245/255-35 in the rear if it would fit just as easily or will i have to run a lot more camber?


Thanks in advance.

 

Id go with 245 in the rear, -3 camber. Roll and bumper tab relocate, should be fine, no pull needed. Will also be consistent sidewall height to the215/40 up front. 235/35 would be too short.

 

Sorry if this is a dumb question but im still learning. if i run -3 camber can the toe still be kept at 0?

 

Go with the 255/35. I have a similar setup in the rear with a 10+38 and made it fit with a fender roll, tab relocate, and -3.6 degrees of camber. You're 3mm less aggressive than my wheels so you may be able to run a few tenths less, but still expect over 3 degrees. Are you lowered?

 

Yeah i am on blackworks coil overs. if i run 255 can i keep my toe at 0? i dont mind running camber i just dont want to burn up my tires if i dont have to. i know if i do 235/35 i probably wont have to run much camber but then its going to be more stretched than i would prefer. i appreciate your reply Jet.

 

thanks for the input s2000junky that's what ill get! How do you tell how tall the sidewall height is? I just want to understand your post a little better. Noob over here.

 

I'm running nearly 0 toe in the rear and the tires are wearing fairly evenly after 6k miles. I got directional tires so I could flip them if it was ever needed due to camber wear. As for calculating sidewall height the easy way would be to use an online calculator of which many exist. http://www.miata.net/garage/tirecalc.html is a great calculator.

 

Jet is helpful in suggesting minimal toe in the rear. .10-.15 per side which is .2-3 total is a good compromise.

I would stick to 245/35 rear for this fitment for a couple reasons, it wont require any fender pulling and camber in the -3 range would be all that is needed. There is a point where you have to ask is 10mm wider rubber worth the negative attributes of more camber making that 10mm of wider rubber now not making contact on the road and more cumbersome fitment issues. -3 camber is about the higher effective/fictional amount of camber to run in the rear on this car typically with sticky rubber, and with less sticky rubber where less G is experienced more positive camber is usually best, allowing the full width of the tread to still make contact with the road under full side G load (which is what you are aiming for with performance in mind) over -3 you not only lose strait line and braking traction into unreasonable levels, but the cars handling in the rear can feel corky and more unsettled which on this short wheel base car isn't heading in the right direction. Also the Ap2 pushes more at the limit anyway, so a 215/255 combo given a reasonable camber setting is just going to further exacerbate an unbalanced level of traction front to rear. On an Ap1 it would be fine.

 

Don't go with anything bigger than 245/35 in the rear because that's what I'm running. I rub even with fender roll. I'm going with a 235/40r18 next on my 18x9 +25. Depends on what ur going for, slammed? Hellaflush? I'm dropped all the way down on my coils. If stock height or moderate drop., then go for the 245/35