So, what's the problem with going to 35-40 offset?

[drledford93]

Well? I've seen that our hub bore and bolt pattern matches the EVO VIII's, so I was looking at wheel comparisons. Has anyone gone that low in offset, and if so, what problems (if any) have you or would one encounter?

Thanks!

Daniel

[derspi]

Going to a lower offset will increase the possibility of rubbing. This will depend on quite a few variables though like wheel width, tire width and if your car has been lowered. I'm sure with the right combination you can get away with +35 offset wheels and not rub. But what that combination is I don't know.

I'm sure those that have run that offset without problems can chime in here.

[madvillian]

do it =) im rockin 18x9's +30

[STRICK-]

<--------18 x 8 +35 here. No problems so far

[Wastegate13]

I'll let you know when my new wheels get here this week. Damnit hurry up!!

[drledford93]

Sweet! No lowering here, so there shouldn't be too much of a problem with it.

Daniel

[funksilver07]

Here...some info. Know what you want to do with your wheel tire set up because you are changing the dynamics of your car by offset. If you push to far outside the wheel or to far in it will not only possibly rub, but will have ill effects on how the car may handle...
http://www.1010tires.com/WheelOffsetCalculator.asp
https://www.rsracing.com/tech-wheel.html#backspace
http://www.usacomp.com/terms.htm

[bacarl]

It seems like most people have been just fine with low offset wheels. I on the other hand put on a set of 18x8+48 and the car got fubar'd... I'm still trying to figure out why because other people are using the same tire or wheel or even both together without problems.

[Trader]

Don't forget the biggest problem is you are adjusting your scrub radius. Therefore you will get a lot more torque steer. Do a search for scrub radius if you don't know what it is.

[Sport6]

Don't forget the biggest problem is you are adjusting your scrub radius. Therefore you will get a lot more torque steer. Do a search for scrub radius if you don't know what it is.

Very good point

[drledford93]

Very good point

Are those evo rims you have on the car? Kinda looks like that...just curious...

Daniel

[drledford93]

Don't forget the biggest problem is you are adjusting your scrub radius. Therefore you will get a lot more torque steer. Do a search for scrub radius if you don't know what it is.

Ok, so I did some research on SAI. What I gleened from the little I read is that it will cause high speed instability (not a problem--I don't take my car to high speeds...I have a 6 month old...) and it will reduce performance somewhat by reducing steering feel. This is a big one. I really like sharp turn in on my cars. That is one trade off I don't want to make. Well, that and the fact that it could fubar my car. That would not be good.

Also, the article states that insurance companies don't like to pay out when there are aftermarket wheels involved...

Hmm...Looks like I may stick with my RX7 3rd gen wheels and just get some sticky 16" rubber, if it exists... =(

Daniel

[zoompastu]

bigger wheels may look better but smaller wheels are deffinitly better for performance.

[mr_mazda329]

bigger wheels may look better but smaller wheels are deffinitly better for performance.

Not Necessarily smaller but lighter. Less un-sprung weight and rotational mass on the outside of the wheel will help.

[zoompastu]

true about the weight but if you gave me the option of auto crossing with a 225/50/15 or a 225/35/18 and they both weighed the same I'ld snatch the 15's any day

[BillTheCat]

bigger wheels may look better but smaller wheels are deffinitly better for performance.


Not Necessarily smaller but lighter. Less un-sprung weight and rotational mass on the outside of the wheel will help.

Exactly why smaller and lighter both make a difference, independently of each other. It takes less force to move that rotational mass as you move it closer to the pivot point/fulcrum. So, given the same weight, a smaller wheel will put that mass closer to the center of the wheel (the pivot point), thus requiring less force to move said same weight.

(And even though I know this, I have forgotten the formula to calculate such things, and am too lazy to Google it.)

[Trader]

There is an excel sheet in this link that calculates this

http://www.msprotege.com/forum/showthread.php?t=123732979

[zoompastu]

easy "DAWG"(gtfo)

[Nliiitend1]

To me, few things scream "ricer" like a complete disregard for chassis/handling dynamics for the sake of "hella flush setups" or "mad tight flushness"....


...but, to each his own, I guess. (dunno)

It does kinda look cool, nevertheless. Just don't tell me that an 18x9ish 30ish offset setup is dynamically superior to a proper setup with a reasonable scrub radius. ;)

[steven88]

wheel bearings can be damaged if going too low of an offset

[noobinacan]

generally speaking.
Low off-set = wheels stick out more
high off-set = wheels go in, towards the suspension more.

Our cars are happy between
+45 and +52 offset.

I use COBB's setup as a guide...it helps a little.

Volk RE30 18”x8.5”, +52mm offset Wheels (Street Class)
Toyo R1R 255/35-18 Tires (Street Class)

Prodrive GC05 18”x 8”, +46 mm offset (Mod Class)
Toyo R888 245/40-18 Tires (Mod Class)