Wheel offset value is the number that ensures
...the center of your wheel's width is aligned with the hub's vertical center
...your wheel does not touch the car's body.

Different wheel styles have different offset values for the same car.

For example, a "dish-in" style wheel has a negative offset number, whereas a cheap steel rim has a large positive number like 30 OR 40.

The offset has absolutely nothing to do and has no relation with the diameter (like 18" or 19") of the wheel.

OFFSET IS UNIQUE TO THE WHEEL STYLE. SO YOU CANNOT ASK SOMEONE'S OFFSET NUMBER AND HOPE IT WORKS ON YOURS unless they are exact same wheels for the exact same car.

 

I KNOW WHAT AN OFFSET IS, IT WOULD BE PRETTY DUMB FOR ME TO SIZE MY RIM FITMENT JUST BY AN OFFSET.... I WAS JUST CURIOUS ABOUT THE OFFSET ON FORUM MEMBER C280'S RIMS. I SAW A PIC ON HIS CAR AND JUST WANTED TO KNOW..

 

CHILL! Take it easy. No one said you didn't know. This forum is a public forum. I just wanted the public know about wheel offset while we were at it. I was elaborating it. Also...making sure people understand that OFFSET and DIAMETER are mutually exclusive.

 

When you guys talk about tires what does xxx/yy/zz mean? Where x, y, and z are real numbers.

-b

P.S. sorry for the wording I was a comp sci major in college.

 

Tires follow this naming convention P[xxx]/[yy]R/[zz]
where P = Passenger car, xxx = width of the tire in mm, yy = sidewall height in percent of xxx, zz = outer diameter of the rim minus 1".

Remember, the above is for most passenger cars. So LT stands for light truck, and so on. R=Radial. ZR=HighSpeed Radial.

There is also load and speed rating that is separate from the above naming convention. 89H 91H 89V are examples.

Note....many people do not know about the minus one part.


ps. forgot to brag. back in college....i used to mop floors and clean the toilet bowls.

 

you are a dork monkey man and you are wrong on all your points where you tryed to correct me.

for a start i said that if he was to run 17-19s he can get a profile tire and it wont affect his spedo, i beleive even 20s with a low profile you can get away with (within 5%) which is legal where i am.

and you go over bumps diagonally to not scratch the bottom of the car on the ground not for the rims (roll my eyes at you again)

mb wouldnt have used 19s on the c 43 at a guess for reasons like
-the tires are more expensive
-not as smooth ride (mb is more leaning towards comfortable ride)
-larger tires "can" rub the guards so they would need to flare the guards more or run harder springs to prevent rubbing. < a problem you may face with new rims, but easily fixed
smaller rims are normally lighter and give better acceleration.

my offset of my 18*8 rims is +35, which is about what you need with this width rim. if you get wider rims you way need to go to a slightly lower offset to stop the tire rubbing the outside guard.