Tire size 215 to 225

[Ruben Monteiro]

Hi guys,

Thinking about changing my tire width from 215 -> 225 the reason why is that the same tire on that width is way cheaper?
Do you guys know if 10mm will change the car's behaviour? Is it safe?

 

[speedking]

You will increase the rolling radius by 10 mm x 40% = 4 mm. That is similar to the difference between full tread and mostly worn, so minimal effect. It will change the speed reported and miles covered / range etc. by about 1% so not really noticeable in the real world.

 

[Ruben Monteiro]

You will increase the rolling radius by 10 mm x 40% = 4 mm. That is similar to the difference between full tread and mostly worn, so minimal effect. It will change the speed reported and miles covered / range etc. by about 1% so not really noticeable in the real world.

Handling wise, any major difference will be noticed?

 

[NCurious]

Hi guys,

Thinking about changing my tire width from 215 -> 225 the reason why is that the same tire on that width is way cheaper?

Don't. Why spend thousands of pounds on a car, or shell out a decent wedge month after month after month after month, to save a few quid on tyres which aren't standard fit?
Also insurance companies need to be notified of such changes. Some are 'better' than others on this subject.

 

[kodawari]

With such a change you can expect:
- Better traction and cornering grip
- Slightly better ride comfort
- Slightly worse acceleration
- Slightly worse steering response (the tyre's sidewall won't be as taut)
- Slightly higher fuel consumption
- Slightly lower speedometer error
- Increased chance of the tyre catching on the arches
- A chance of being fined by the Portuguese police (or paying to have the new size added to the car's documents)

 

[speedking]

With such a change you can expect:
- Better traction and cornering grip
- Slightly better ride comfort
- Slightly worse acceleration
- Slightly worse steering response (the tyre's sidewall won't be as taut)
- Slightly higher fuel consumption
- Slightly lower speedometer error
- Increased chance of the tyre catching on the arches
- A chance of being fined by the Portuguese police (or paying to have the new size added to the car's documents)

- Better traction and cornering grip: depends on contact patch size, which can vary between manufacturers
- Slightly better ride comfort, - Slightly worse steering response: assuming more flexible sidewall, an Extra Load version increases sidewall stiffness reversing both those effects
- Slightly higher fuel consumption: tyre pressure and compound also significant here

size isn't everything

 

[kodawari]

- Better traction and cornering grip: depends on contact patch size, which can vary between manufacturers
- Slightly better ride comfort, - Slightly worse steering response: assuming more flexible sidewall, an Extra Load version increases sidewall stiffness reversing both those effects
- Slightly higher fuel consumption: tyre pressure and compound also significant here

size isn't everything

My post was written considering size in isolation. Everything else must be held constant, including tyre brand, model, sub-model etc.
Size isn't everything, of course.

 

[NCurious]

Size isn't everything, of course.

Good job too, as I don't know what I've had done if it was

 

[James-]

Has anyone tried and put on 225s? (215/40/18 vs 225/40/18)

Here in the UK, it seems around £60 per corner difference and I really want to put some PS4 tyres on mine...

 

[James-]

 

[JoeyPropane]

I'm pretty sure it's been done without issue - anyone know how Hyundai would look at it from a warranty point of view, though?

I'll probably end up doing the same, because the price difference is bloody stupid otherwise!

 

[James-]

I think I'm just going to do it, there will no warranty implications. They are tyres, you can put on any brand you want and the size isn't an issue. I'm thinking back to my GT86 which also had 215 tyres and a 7.5" rim, just it was 17" not 18" and the 225s were perfectly fine...

The reality is the PS4 is a better tyre, the extra 10mm of width which actually according to the diameter is more like 8mm and an increase in ride height of 4mm... it's just not going to make any difference. It will be fine and tyres are much more accessible then.

Also I found this, and 100s of other websites back it up.

18x7.5 Wheels, Tire Size for 18x7.5 Rims

wheelssize.com

51% of all tyres are 225/40/18 - I think that says it all really.

Chances are Hyundai are/were getting some massive kick back from Pirelli...

Plus further research suggests that the maximum you should ever put on a 7.5" is 235... so 225 is going to be completely fine. Going to order them straight away.

 

[Jajodu]

I'm pretty sure it's been done without issue - anyone know how Hyundai would look at it from a warranty point of view, though?

I'll probably end up doing the same, because the price difference is bloody stupid otherwise!

Have you tried camskill for tyre prices?

 

[Aaron702]

The difference is minimal. I will certainly be doing it as the price difference is incredible.

 

[Jonnysykes]

I think I'm just going to do it, there will no warranty implications. They are tyres, you can put on any brand you want and the size isn't an issue. I'm thinking back to my GT86 which also had 215 tyres and a 7.5" rim, just it was 17" not 18" and the 225s were perfectly fine...

The reality is the PS4 is a better tyre, the extra 10mm of width which actually according to the diameter is more like 8mm and an increase in ride height of 4mm... it's just not going to make any difference. It will be fine and tyres are much more accessible then.

Also I found this, and 100s of other websites back it up.

18x7.5 Wheels, Tire Size for 18x7.5 Rims

wheelssize.com

51% of all tyres are 225/40/18 - I think that says it all really.

Chances are Hyundai are/were getting some massive kick back from Pirelli...

Plus further research suggests that the maximum you should ever put on a 7.5" is 235... so 225 is going to be completely fine. Going to order them straight away.

View attachment 19190

Wrong about warranty.
Hyundai will void that warranty if the tyres are no standard size. You can change to whatever brand you like but the size has to be the same

 

[NCurious]

I think I'm just going to do it, there will no warranty implications. They are tyres, you can put on any brand you want and the size isn't an issue.

The proof of the pudding is easy:
1) Ring up Hyundai UK and ask then if going to a different/non-OEM standard tyre size/profile is okay
2) Then get on to your insurance company and ask the same.

Bingo, there will be your answer- positive or negative, and irrelevant to whatever you read elsewhere.

 

[najaja]

A few additional points to consider:

- Just because it's technically possible to install certain sized tyres on certain sized rims doesn't mean it's doable with a specific car model. Allowed size tolerances differ per country (how much the wheel is allowed to poke out for example).

- I haven't seen a TUV rim certificate which would allow 225/40/18 tyres for i20 N without any additional notes (most common issue I see is that for example with ET50 and 225 TUV says that the tyre may poke out too much from the read fenders).

- Just to mention I also haven't seen any TUV certified 17" rims yet..

 

[najaja]

A few additional points to consider:

- Just because it's technically possible to install certain sized tyres on certain sized rims doesn't mean it's doable with a specific car model. Allowed size tolerances differ per country (how much the wheel is allowed to poke out for example).

- I haven't seen a TUV rim certificate which would allow 225/40/18 tyres for i20 N without any additional notes (most common issue I see is that for example with ET50 and 225 TUV says that the tyre may poke out too much from the read fenders).

- Just to mention I also haven't seen any TUV certified 17" rims yet..

And I haven't found other info for OEM sized rims ET53 with 225/40/18 than what people have said here.

 

[James-]

Dealer said 225 is fine, a lot of you are quite hysterical aren't you...

 

[NCurious]

Dealer said 225 is fine, a lot of you are quite hysterical aren't you...

Is the 'dealer' Hyundai UK? A Hyundai dealership recently told me the KONA N also comes in a manual gearbox. So i wonder if that particular dude at that particular dealership would also be so clued up about 225 tyres lol


Also, what did the insurance company tell you?

Where they hysterical, too?