Tyre sizes - 225 vs 235

froggy1985

Hi,

Hopefully someone can give me some guidance here.

I bought a car a few months back from the UK, everything has been perfect with it, but I had to get a tyre replaced on the weekend and noticed that it was a 235 rather than a 225. This was the only 235 on the car, the rest were 225s, I understand it should not have been there and potentially dangerous etc. I didn't think to check this when I bought the car.

I am going to get all tyres replaced. I am wondering is there any reason why I shouldn't put 4 x 235s on the car? I found reasonably priced 235s online (when looking to get this one fixed) and am wondering whether it would cause any issue if I were to buy them and have them fitted. Note that 235s are listed "SUV" - but my car is a mazda 6 estate, if I search by car brand it brings up 225s.

If someone could explain the differences / cons to me it would be much appreciated.

Full tyre sizes = 235/45 R19 vs 225/45 R19.

Thanks in advance.

The high horse brigade

froggy1985 wrote: »

Hi,

Hopefully someone can give me some guidance here.

I bought a car a few months back from the UK, everything has been perfect with it, but I had to get a tyre replaced on the weekend and noticed that it was a 235 rather than a 225. This was the only 235 on the car, the rest were 225s, I understand it should not have been there and potentially dangerous etc. I didn't think to check this when I bought the car.

I am going to get all tyres replaced. I am wondering is there any reason why I shouldn't put 4 x 235s on the car? I found reasonably priced 235s online (when looking to get this one fixed) and am wondering whether it would cause any issue if I were to buy them and have them fitted. Note that 235s are listed "SUV" - but my car is a mazda 6 estate, if I search by car brand it brings up 225s.

If someone could explain the differences / cons to me it would be much appreciated.

Full tyre sizes = 235/45 R19 vs 225/45 R19.

Thanks in advance.

I have a Mazda 6, 225/45 r19 is what's recommended for it. Adding a slightly wider tyre will make it ever so slightly harder to turn. You may not even notice the difference.

I'd have no problem fitting them if there was a decent saving. 225/45 r19 tyres are very pricey

wexie

Much of a muchness probably, provided they're not rubbing anywhere which is unlikely with such a small difference.

The 235's are 1.1% larger in diameter and 4.5% wider.

You're speedo will read a teeny bit slower but should be well within the margin of error, as a matter of fact it may make it a little more accurate.

When you're driving 70.8 mph it will read 70. might check this out with a GPS but unless it's unusually accurate it should still read faster than you're actually going.

details here : https://tiresize.com/tyre-size-calculator/

froggy1985

The high horse brigade wrote: »

I have a Mazda 6, 225/45 r19 is what's recommended for it. Adding a slightly wider tyre will make it ever so slightly harder to turn. You may not even notice the difference.

I'd have no problem fitting them if there was a decent saving. 225/45 r19 tyres are very pricey

Yeah the tyres are listed online as "SUV" like I mentioned, but as far as I can tell that shouldn't make any difference? Never noticed any rubbing on the 235 to date. Didn't even notice it was a different size. Probably around a 30% saving on these over buying 225s, and bonus that they match the 235 I got on the weekend so I'd only need 3.

Thanks for the feedback. Next order of business is to buy a spare to stick in the boot too

The high horse brigade

froggy1985 wrote: »

Yeah the tyres are listed online as "SUV" like I mentioned, but as far as I can tell that shouldn't make any difference? Never noticed any rubbing on the 235 to date. Didn't even notice it was a different size. Probably around a 30% saving on these over buying 225s, and bonus that they match the 235 I got on the weekend so I'd only need 3.

Thanks for the feedback. Next order of business is to buy a spare to stick in the boot too

The reason for SUV is probably to do with the load index. I'm not a tyre expert so cannot say for sure

https://www.oponeo.ie/tyre-information/tyre-load-index

wexie

The high horse brigade wrote: »

The reason for SUV is probably to do with the load index. I'm not a tyre expert so cannot say for sure

https://www.oponeo.ie/tyre-information/tyre-load-index

Quite possibly, I'm not sure about car tires but in SUV tires you could see the exact same tire (and same size) but one would be marked LT (Light truck and have a higher load index)

froggy1985

The high horse brigade wrote: »

The reason for SUV is probably to do with the load index. I'm not a tyre expert so cannot say for sure

https://www.oponeo.ie/tyre-information/tyre-load-index

The tyres in question are marked XL which I understand is extra load, again, probably unnecessary in my case but shouldn't have any significant impact on performance? Might be a little more resilient too, the wife tends to see potholes as a target rather than something to avoid :rolleyes:

wexie

froggy1985 wrote: »

the wife tends to see potholes as a target rather than something to avoid :rolleyes:

In that case the extra 5 or so % on the sidewall won't hurt at all.

colm_mcm

Once they don’t rub, you’re happy with having the non standard size, and they’re all the same size it won’t make much odds.