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Discussion Starter #1
Hello, newbie here. I just bought a 1997 Mercedes e320 sedan. I am planning to change the stock wheel/tire and below is what I want

Stock: 16" wheel and 215/55/16
My plan: 17" wheel with 225/50/17
Will i fit the car without adjusts? Will wheel 17 x 8 fit the tire?

Thanks.
 

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'04 W211 E240, MY10 W204 C300
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You can use 225 tyres however with a 45 ratio rather than 50.
According to the W210 fitting chart 17 x 8 wheels with 235 x 40 x 17 will keep your speedo and ABS within spec.
The offset of the wheel should be around 35 - 37
 

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2005 W215 CL500
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As above, because you are increasing the radius of the wheel by 1/2 inch (12.5mm) you must reduce the height of the side wall of the tyre by 12.5mm.

The tyre wall is stated as a percentage of the width. So, a 225/50 will have a tyre wall depth of 50% of 225, which is 112.5. But the 215/55 tyre is 113mm, so you must reduce this by 12.5mm. So for your 17" wheels ypu need a tyre wall very close to 100mm.

So a 225/45 is close.
 

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Discussion Starter #4
Thank you

Thank you for all the replies, so 225/45/17 or 235/45/17 will work, I assumed no change in the suspension also.
Thanks
 

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'01-E320 & 02-ST2
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Thank you for all the replies, so 225/45/17 or 235/45/17 will work, I assumed no change in the suspension also.
Thanks
I would not recommend 225/45-17. It's close, but your speedo will be off and you will rack up more miles than you drive.

235/45 is the proper size for the 17" wheel on the W210 chassis (some came with 17s, and that's the size MB used as well). You can, if you choose, use 225/50-17. (I know this because it's what is on my car.) While it should be a little taller, the speedo is barely off 1mph at 70-75 judging by my GPS.

There are, however, a lot more tire choices in the 235/45-17.

Good luck and happy shopping.
 

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Discussion Starter #6
235/45/17

Thanks, I will get the 235/45/17 as per recommendations from everybody.
Will post pictures later.
 

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2005 W215 CL500
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You can use 225 tyres however with a 45 ratio rather than 50.

Did you see post #5.

You can't just pluck a size out of the air and say it will fit...it may do, but it isn't correct. The 45 is a ratio, not a size...so it's the wrong ratio when applied to a 225 tyre.
 

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E320/E250 Bluetec Ford F350 6.7l
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I keep posting this over and over, that nominal tire sizing is having huge tolerances and for such comparison you should use manufacture's rpm data to compare.
It is very possible that tire from one manufacturer in bigger nominal size can be in fact smaller than tire from other manufacturer in smaller nominal size.
 

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Discussion Starter #9
Sorry, one more question. If I go 235/45/17, will my cruise control be affected or not work? The mechanic told me this.
 

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E320/E250 Bluetec Ford F350 6.7l
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WHAT?
CC and traction system will be affected only if you put mismatched tires on your corners.
Seems CC is the first one to react on small mismatch, while ESP takes bigger difference.
 

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'04 W211 E240, MY10 W204 C300
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You have the potential to have ABS ASR or cruise control problems if the size of the tyres deviates more than 3% from standard MB specs.
 

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You have the potential to have ABS ASR or cruise control problems if the size of the tyres deviates more than 3% from standard MB specs.
Let's make it clear >>> those systems are design to sense DIFFERENCE between wheel rotations and have no way to know that you put 4 identical semitruck wheels on your car.

 

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You have the potential to have ABS ASR or cruise control problems if the size of the tyres deviates more than 3% from standard MB specs.
As my friend above has said...you allow the system too much intelligence. The car does not care what size tyres you put on, so long as they are all the same. The difficulty arises when you put different sizes on the front and back axles.

CC will kick out at about 70mph. This happens even if you have one tyre worn more than another.
 
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