My8DriftsMe

I want to get a set of rims but i dont know the offset should get. i want to get an 18x8 or 18x8.5 but i dont know the correct offset to go with.

Mazurfer

Please do a search........it's been covered about one bagillion times. Your stock offset is +50. You can go to tirerack.com and they have some good info and fitment guide.

zerobio

I was under the impression the stock offset was +50mm.

BTW, my SPYN wheels are +40 and I definitely feel some difference in steering and handling. I think my next wheels will be closer to 50.

Mazurfer

You're absolutely right.....my bad.....I had a brain fart! I will go back and edit that!

zerobio

No prob. Take it easy.

Footman

iTrader: (2)

Would a smaller offset mean the wheel will be mounted closer to the car? (wheel to wheel width is narrower)?

Wouldn't it also depend on the distance from the outer wall of the wheel to the hub face as well?


My understanding is that wheel offset is the distance from the centre line of the wheel to the hub. So a lower offset has less distance, so it's closer to the car?

But that seems to go against what I've been hearing on the forum. Can someone enlighten me?

DarkBrew

http://www.1010tires.com/WheelOffsetCalculator.asp

Footman

iTrader: (2)

Thanks Darkbrew, the calculator is useful, but for me, I'm trying to get the understanding. Which I don't understand.

Suppose two wheels, both are 8" wide. One has 50mm offset, the other has 48mm offset.

If offset is the distance between the centre of the wheel and the outer wall, wouldn't the 48mm wheel be mounted closer to the car? Why is it that the 48mm offset is actually further out?

Using the calculator, it says it will extend it 2mm more and give 2mm more inner clearance. I can't quite visualize why the 48mm is mounted wider when the offset is less.

dannobre

iTrader: (3)

Offset is the distance from the centerline to the mounting face of the wheel

So a +48 offset lip will be 2mm out from the lip on a +50 wheel..you won't need to worry about 8mm wheels till you get into the +30 range.....if you go wider though....it will matter.

+45 9.5" wheels barely fit...so use that as a place for the outer rim...and go from there

TrochoidMagic

from what i know:

left wheel as an example: +++++O----- +=+offset
-=-offset
O=centerline
so choosing wisely if goin wider with wheels to go with too low of a positive offset so you can keep them in ur fenders.

paulmasoner

iTrader: (1)

the Will it Fit? thread: https://www.rx8club.com/series-i-wheels-tires-brakes-suspension-55/will-fit-thread-133500/