Determining offset
Thread Starter
Senior Member
Joined: Feb 2006
Posts: 290
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From: MD
2014 E350 4Matic
Determining offset
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?
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?
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From: Chino Hills, CA
Mercedes C300 Sport, BMW 745Li, VW Mk6 Golf TDI
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.
http://www.tirerack.com/wheels/tech/...jsp?techid=101
It's a balancing game between offset, width, size.
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From: Atlanta, GA
2008 C300 Sport 6 Speed Manual, 1953 Chevy Bel-Air, 2015 Audi allroad, 1963 Chevy Apache
MBWorld Fanatic!
Joined: Apr 2008
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From: Chino Hills, CA
Mercedes C300 Sport, BMW 745Li, VW Mk6 Golf TDI
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.
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.
Thread Starter
Senior Member
Joined: Feb 2006
Posts: 290
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From: MD
2014 E350 4Matic
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)
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)
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MBWorld Fanatic!
Joined: Sep 2008
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From: Delaware
2004 Mazda6, 1993 RX7
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
.
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
.
Last edited by kevink2; Feb 15, 2010 at 10:41 PM.
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Thread Starter
Senior Member
Joined: Feb 2006
Posts: 290
Likes: 8
From: MD
2014 E350 4Matic
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.
Will this be acceptable? - As long as they don't stick out giving a 4X4 look, I would be fine with it.
Junior Member
Joined: Jun 2008
Posts: 45
Likes: 0
From: West Lafayette, Indiana
2008 C350
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)
Thread Starter
Senior Member
Joined: Feb 2006
Posts: 290
Likes: 8
From: MD
2014 E350 4Matic
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)
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)
It would be helpful if you can post pictures.
Newbie
Joined: Feb 2010
Posts: 12
Likes: 0
CLS 55
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.
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.
Thread Starter
Senior Member
Joined: Feb 2006
Posts: 290
Likes: 8
From: MD
2014 E350 4Matic
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?
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?
Super Member
Joined: Aug 2009
Posts: 600
Likes: 2
From: Northern California
09' E350 AMG Sport, 09' C300, 03' Honda S2K
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
Junior Member
Joined: Feb 2010
Posts: 58
Likes: 0
C350
With 18" tires you should just run either a 40front/35 rear or just do 40 all around.
