Pristine

I'm considering getting new wheels and I wanted to get a better understanding of "offset". Based on my limited understanding, offset determines how much the wheel sticks in or out.

I read somewhere on the forum that for C300, the front offset is 45 and rear is 54? Is this the number I need to stick with or is there a range of offset that is OK for our cars?

Does offset vary with height or width of the wheel? Ex. would offset be different for a 8" wide and a 9" wide wheel?

Azn_C300

http://en.wikipedia.org/wiki/Offset_%28wheel%29
http://www.tirerack.com/wheels/tech/...jsp?techid=101

It's a balancing game between offset, width, size.

Pristine

Thanks. That was helpful.

Is there a way to find out what offset corresponds to different wheel widths for C300 in 18" and 19"?

C300Sport

Try this calculator;

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

Pristine

Very cool
Can you give me offset for 7" wide wheel for our car to get started?

Does the offset change with going from 17" to 18" or 19"?

Azn_C300

you're going with 7" wide all around? That's pretty low.

Offsets would only be tweaked on wheel size changes depending on how aggressive a stance you have. If you have some wheel poke, larger size might require pulling in that a bit with higher offset or shortening the width.

Pristine

I'm considering 8.5 front and 9.5 rear.
But I wanted to get an idea of what offset is required for different widths starting with 7" (which is what I believe I have now on front with 7 spoke style wheels)

kevink2

I think you have 7.5" front 8.5" rear. 2008 OEM wheel & Tire specs:

Wheel Size, offset
Tire Size, OD inches, Load & Speed Rating
__________________________________________________ _____

SAME SIZE, F&R

C230 & C230 4matic - (Canada Only)
7x16 _ 47mm
205x55 _ 24.88" _ 91H SL

---------------------------------

C300 Lux, C300 Lux 4matic
C350 & C350 4matic - (Canada Only)
7.5x17 _ 47mm
225x45 _ 24.98" _ 91H SL

__________________________________________________ __________

17" STAGGERED

C300 Sport, C300 Sport 4matic, C350 sport
C230 Sport, C230 Sport 4matic, C350 & C350 4matic (reg and sport) - (Canada Only)

front
7.5x17 _ 47mm
225x45 _ 24.98" _ 91H SL

rear
8.5x17 _ 58mm
245x40 _ 24.72" _ 91H SL
__________________________________________________ _____

18" STAGGERED

C300 Sport, reg & 4matic, C350 Sport
C350 Sport 4matic - (Canada Only)

front
8x18 _ 50mm
225x40 _ 25.08" _ 92Y XL

rear
8.5x18 _ 54mm
255x35 _ 25.02" _ 94Y XL

*** C63 AMG ***

front
8x18 _ 45mm
235x40 _ 23.40" _ 95Y XL

rear
9.0x18 _ 54mm
255x35 _ 25.02" _ 94Y XL

.

Pristine

Thanks, this gives me a good idea of what offset range I need to be looking at for different size wheels.

Pristine

There is a set of wheels that I'm considering that is 18", 8.5" with 45 mm offset (both front and back).

Will this be acceptable? - As long as they don't stick out giving a 4X4 look, I would be fine with it.

kimgoon320

I am running 18"8.5 with 45mm offset on front with 235/40/18 tires.
They fit perfectly and does not stick out. I can say they are not that aggressive.
You would be fine. I will post pics of my new wheels and tires so you can take a look soon.
(I run 18"9 with 45mm offset on rear with 255/35/18)

Pristine

Good point about not having a v. agressive look. I figured that my current 17" are 8.5 with higher offset, then putting 8.5 with lower offset will make it come out a bit more.

It would be helpful if you can post pictures.

markc350

I am going to run 19x9 ET35 and 19x10 ET38 for a pretty aggressive offset. Best to stay 40+ if u want to be conservative

xsivspd

I am look into purchasing the following:

19x8.5 all around.

Which one of the following offsets would be the IDEAL fit the W204 C300 sport?

25 / 32 / 45

I wouldn't like to have any rubbing issues or have to roll the fenders.

Thanks to any replies.

markc350

definately 45

Pristine

If I'm putting 18", 8.5" 45mm wheels front and back, what different options do I have in terms of tire sizes?
Can I put:
235/40 front
255/35 Rear
Is it possible to have a configuration that avoids xxx/35 and have at least xxx/40 for sidewall?

charliele729

I am running with the C63 rims, I wouldnt go any lowe than that. The fronts are perfect to the fender, if any lower, it would probably stick out, but it is also a half inch wider than the 17's

markc350

With 18" tires you should just run either a 40front/35 rear or just do 40 all around.

Pristine

I'm considering going with 235/40 all around.

E92-Lighting

never go with stock offsets unless you love your wheels to be sunk in

markc350

nuff said!