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I have many times on many different vehicles. I did how ever keep the same size on both front wheels and the same size tires on both rear wheels. Now as for my Smart 451 I have had different brands also with out negative effects. Continental front/ Sumac rear, and Yokohama front/Hankook rear. When money and timing are aligned I do get a matched set fitted up. Currently on 4 Kumho PS-31's.
 

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You're not serious, are you?
Jim
There is something to what he said. Each brand of tire will have slightly different handling characteristics so that is why the recommendation is not to do so. Folks have for eons and will probably continue to do so. Other than snow tires on the rear of my rear wheel drive cars decades ago I have never since mixed tire brands and will never do so. Even tires of the same brand but different models may have different handling characteristics.
 

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You never ever run two different brand tires-on any car! That un heard of. Not safe!
I second that! And I have first hand experience. Let me find the thread I posted on it...be right back

Here it is. I think the thread title says it all.
 

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I second that! And I have first hand experience. Let me find the thread I posted on it...be right back

Here it is. I think the thread title says it all.
I'm not arguing the point about mixed brands... but are you sure your TCS/ABS activation wasn't due to improper sizes?

I too, have a 2016 Passion and I regularly experience the sudden skidding your thread discusses... but I believe it is because the previous owner of my smart decided to put the same size tires (185/60 R15) on all four corners (they are the same brand).

My TCS kicks in most often on sweeping left handers, both coasting through and accelerating through, and you're right... it can scare the crap out of you. I've since learned I can anticipate it... but eventually a new set of properly staggered tire diameters will get the math equation back in line.
 

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I'm not arguing the point about mixed brands... but are you sure your TCS/ABS activation wasn't due to improper sizes?

I too, have a 2016 Passion and I regularly experience the sudden skidding your thread discusses... but I believe it is because the previous owner of my smart decided to put the same size tires (185/60 R15) on all four corners (they are the same brand).

My TCS kicks in most often on sweeping left handers, both coasting through and accelerating through, and you're right... it can scare the crap out of you. I've since learned I can anticipate it... but eventually a new set of properly staggered tire diameters will get the math equation back in line.
I'm positive they were the factory size. As soon as I went back the the Conti's, all scaryness disappeared.
Let's not forget, too, that I was doing a cheapest-tire experiment.
 

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I'm sorry but I linked the wrong thread, although it was directly related.to the tire swap. Let me find the other one.

No, that was the correct thread, but I don't make the connection to the new mismatched tires until later in the discussion. Here

 

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You're not serious, are you?
Jim
Where did this statement come from? My opinion, that is ridiculous!! Was told once only run Chevron gas in your motorcycle,everything else is crap. Well, the person that told me that had all the valves burnt at118k miles,I know because I bought her motorcycle! I gas up at Costco, still running at 147k miles!
There are too many factors that can cause traction problems, age of the rubber---check date codes. how were they stored and at what temperature? Tire pressure? Type of tire compound? road condition? Wheel size, alignment. ;Was the same tire pressure gauge used---gauge error is common. At what time of the day was pressure checked----Temperature. and so on.
I would not want two different tires , say on left front and right front. Also depends on how hard you push the car. I own a Shelby gt500 and it is dangerous when temperature is in the 40s. The tires need to be warmed up good!! Car has wheel spin at 1/4 throttle! Been sideways a few times going around corners!! Back end brakes loose & unexpectedly---Many Shelby Mustangs have crashed as this easily happens! Car has wheel spin in 3rd gear at 1/2 throttle!! I'm never sure when the conditions are such that this will happen. Drive it like there is an egg between my foot & gas pedal!
Many opinions here----like how big is the smart car gas tank? Many numbers out there!!
 

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I run any combination of anything I can find cheap.

Shirley you drive according to the way the car feels at all times and it aint a racing car so adjust accordingly.

Is there a legal limit to tyre age in the States? In the UK and Europe it is not checked, any age tyre is good as long as the condition satisfies the legal requirements.
 

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I don't even know what you are responding to.
Let alone the point you are trying to make... your rant goes from fuel to tires to...
And I say rant, because there are at least 8 exclamation points in your post.

Whatever 🤔
response was to comments about tires. mixing brands etc. The "rant" you refer to is the wide range of comments, some of them with questionable merit! Example---all the comments about fuel tank size including misinformation from MB! The point I was trying to make----"CLEAR" is all kinds of opinions are on this site and many are uneducated guess work, some are accurate. Nothing like doing some testing---to measure a gas tank capacity and not rely on 3 or 4 different figures. I take note you are from California----the land of fruit and nuts. I was born there and have lived out there, so I have observed and do appreciate your comments.
 

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I run any combination of anything I can find cheap.

Shirley you drive according to the way the car feels at all times and it aint a racing car so adjust accordingly.

Is there a legal limit to tyre age in the States? In the UK and Europe it is not checked, any age tyre is good as long as the condition satisfies the legal requirements.
Here in Arizona, Heat frequently makes tires unsafe because they rot before they wear out. Bought a new truck, one month later Michelin replaced all tires under warranty--sidewalls were all cracked due to weather. Truck was on dealers lot for about one year before I bought it. Don't know of any law regarding tire age,All tires here have a date code. A local tire dealer will tell you your tires are unsafe if they are over 4 yrs old---Discount Tire. Visual inspection is also a factor regarding heat damage.
Spot on----"the way the car feels at all times" unfortunately many drivers would not know what this means. Driving race cars will show you what this means!! Push it until you spin out!!
 

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Over two years ago I bought my Buick from Hertz car sales in San Diego.
Continental's on rear and Firestones on the front. I driven it for 2 years and who knows how long Hertz rented it out that way. I haven't had any problems.
I think if it were that dire of the situation liability insurance would put a stop to it.
Tire Wheel Car Land vehicle Vehicle
Tire Wheel Automotive tire Light Motor vehicle

One of these days I'll take the time to get a match set. Which is what I prefer, but until then no biggy, the sky won't fall.
 
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