u won't regret it.

 

[QUOTE=s2sik,Jul 20 2009, 11:55 AM] 17s

 

The weight difference isn't tremendous either way, but if you peruse 17" and 18" wheel weights in the same model and width, the 18" is always heavier. Then look at same-model/same-width/same-height tire weights, usually the 17" tire is a little heavier, but not always.
The 18" combo will almost always be heavier overall.

Ferinstance:
OZ Allegerita 17x8.5 = 15.6 lb., 18x8.5 = 17.4 lb., 1.8 lb. heavier
Bridgestone RE11 255/40-17 = 26 lb., 255/35-18 = 27 lb., 1 lb. heavier

As for tire weight being "farest"(?) from center, the tread of a 255/40-17 vs. a 255/35-18 is the same distance from center. Any additional tire mass is in the sidewall right at the rim. I would bet that the polar moments of 18" vs. 17" wheel+tire are going to be very close.
In the end, the weight difference and polar moment difference isn't going to be enough to make for a measurable performance difference anyway.


So the question is: Why spend WAY more on 18" wheels/tires for zero performance benefit?

 

how many people track on 18's vs. 17's?

That should be your answer right there performance/cost wise.

 

You made the right choice. 17s or 16s is the only way to go!! 18S look like 19s on the S. (depending on the wheel, but most do)

 

https://www.s2ki.com/forums/index.ph...&f=12&t=717107

 

Dident go with 18 cus of performens did go with Ce28 for that reason tho but i like the look of 18 more then 17's thats the reason. To be tru with you i was going to go with 17's but disided to go with 18's the last min. And yes im happy i did. but im thinking of geting a set of 17 for the track now tho. Atleast if the 18" r comps is way to expencive