Is it wise to have different tyre sizes on front and rear even if the alloys are...

Unparalleled

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of the same size?

I currently have a c180 (w204) and I'm about to order some 19x8.5" alloys. My question is it wise to have say, 225/35/19 Front and 255/30/19 Rear tyre sizes on the alloys or should I just stick to the same size for both front and rear?

thanks. :)
 

whitenemesis

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W204!

Stick with what youy have..

That said there is nothing wrong with dif sizes f/r :)
 

whitenemesis

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Soz, just re-read your post.

Dif tyre sizes usually go with dif rim widths, not uncommon with MB Sport opnions
 

Quick Silver

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I had the same size tyres on my C180 (203) now long gone ,it killed the ride quality and made steering at low speeds notchy/snatchy but did improve the road holding .
 

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Welcome to the forum. 19" will give you a vrey hard ride with a sidewall height of only 76mm
 

kth286

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Agreed - wonder if F1 cars would have low profiles if it was a good idea.

All show and no go if you ask me.
 

rf065

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Agreed - wonder if F1 cars would have low profiles if it was a good idea.

All show and no go if you ask me.


They do, just not as low as some car tyres.
You cannot compare a F1 car with road cars, they are built to operate under completely different conditions and adhere to different regulations.

Russ
 

mikestrivens

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Perhaps they should put lots of pot holes and bad road surfaces on F1 tracks.
 
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What I failed to mention is that it's a sports model which comes with slightly larger rear wheels (if I'm not mistaken). I'm still torn between ordering same size all around or slightly larger rears.
 
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I had the same size tyres on my C180 (203) now long gone ,it killed the ride quality and made steering at low speeds notchy/snatchy but did improve the road holding .



When you say the same tyre sizes, do you mean the different front and rear examples I gave above?
 

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If the rims go 1" bigger then the profile of that tyre goes down 1 size so that the overall diameter stays the same
 

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I was thinking more in terms of width, Malcolm.

it works the same way JEZ

For instance on my car I can use 255 wide tyres all round, the profile then would be 40. If I put on wheels and tyres on the rear say 285 wide, then you drop the profile down to 35, then the rolling diameter stays the same

So with the 255 x 40 tyres I have a sidewall height of 90mm.

285 x 35 will give a height of 97.75 and that is as near as you can get
285
 

JEZ.S320L

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it works the same way JEZ

For instance on my car I can use 255 wide tyres all round, the profile then would be 40. If I put on wheels and tyres on the rear say 285 wide, then you drop the profile down to 35, then the rolling diameter stays the same

So with the 255 x 40 tyres I have a sidewall height of 90mm.

285 x 35 will give a height of 97.75 and that is as near as you can get
285

That doesn't quite scan with the issue I had when I first got my ML, Malcolm. If you remember, I first posted on here.

My CC wasn't working properly (kept disengaging). Someone asked me to ckeck my tyre sizes. Fronts were 20/40/285 and rear 20/40/295. I changed them all to 20/40/295's and CC worked properly again. No problems since.
 

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That doesn't quite scan with the issue I had when I first got my ML, Malcolm. If you remember, I first posted on here.

My CC wasn't working properly (kept disengaging). Someone asked me to ckeck my tyre sizes. Fronts were 20/40/285 and rear 20/40/295. I changed them all to 20/40/295's and CC worked properly again. No problems since.

The ML could be a border line case, and it should have 295 x 40 or 45 all round. The 4 wheel drive couls be critical on your ML.

The difference back and front was it did not like
 

LYNALL

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Both mine and the wifes cars have the staggered wheel set up with different size tyres front and rear.



Lynall
 


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