I wanted to purchase all around 18x8 +45 - 225/45/18 from a member here for IS350 RWD. I just realized that our stock size is 225/40/18. Will that extra 5 cause problems with rubbing etc ?

 

R u lowered? If not you should be fine as the difference in wheel diameter is 5.

 

No, all stock. I did some quick research, but still unclear....whats the speedometer difference ? and are there any REAL issues with ABS and traction getting thrown off ?

 

Speedo difference should be minimal. Maybe 5km/h Its not like you're changing rim sizes. Just the side walls of the wheels are smaller. The ride would be a little bumpier as there is less air between the ground and wheels to absorb the impact.

 

You mean less bumpier? Going from 40s to 45ss, taller tire

 

LOL yes less bumpier i read you are going to smaller tires. my mistake.

 

Didn't fit, rubbing