[e89 z4 35i] is it ok to use the same wheel and the same tire for front/rear

Busterboo said:

So, the seller put fronts on the rear, too? What else did he do, I wonder?

Click to expand...

Busterboo said:

Are they runflats, by any chance?

Click to expand...

B21 said:

AFAIK no 35i/35is had a square set up from the factory…the 35i/35is are the most powerful of E89s and can easily overwhelm under tyred rear wheels..

The E89 is not good at tolerating mismatched tyre rolling radius..it appears normal till the stability control is required to intervene and then it MAY cause an issue..in addition it MAY cause auto /DCT issues in certain circumstances..

Click to expand...

ad26kr said:

the original setup is front: 225 / 35 / 19, rear: 255 / 40 / 19.

Click to expand...

Pondrew said:

ad26kr said:

the original setup is front: 225 / 35 / 19, rear: 255 / 40 / 19.

Click to expand...

Nah. If 19" wheels they would be 225/35/19 front and 255/30/19 rears.

Also the width of the tyre (225 on rear) will not cause any issues on it's own. It's the rolling radius changing that could cause potential problems with DSC and mechanical drive components (unlikely for the latter TBH).

Basically the width of your tyres is irrelevant on their own.

Click to expand...

B21 said:

Let’s start from the top..

What is each tyre dimensions and each wheel in each location pls?

Confirm the make and model of tyre pls

Given the age , the number of original versions and subsequent changes I’m not clear what is going on..

Click to expand...

Pondrew said:

OK.....
225/40/18 front is 9mm smaller circumference than a 225/35/19. So nothing. Not even 0.5%.

225/40/18 rear is 5mm larger circumference than a 255/30/19. So again, nothing. Not even 0.25%.

Nothing there should affect anything adversely on the car. The ONLY question is whether a 225mm width tyre is suitable for you car's handling/ power characteristics. I would say yes. It's just over an inch difference. I know some people say an inch is a lot, but that is a completely different subject!

Click to expand...

B21 said:

So the good news is that all4 wheels /tyres match…general regarded maximum tolerance front / rear is regarded about 1.5% to 2%..but since yours are the same front n rear not an issue..

Looks like the previous owner cracked his alloys and replaced them with something much cheaper…

35i/35is was never sold with a square tyre set up..so technically it’s illegal as the rears are undersized relative to what BMW specified..

In addition the the reports for this tyre in the wet are hardly glowing…

So little to redeem the situation..given the power of the 35i..the undersized rear tyres and poor wet grip I hope you have adequate life insurance and litigation cover…

Reviews for Nexen Opera tyres are generally mixed, with some users praising their value for money and decent performance in dry conditions, while others criticize their lack of grip in wet weather, particularly on higher performance vehicles, and potential concerns regarding noise levels and uneven wear depending on the specific model and driving style; overall, Nexen Opera tires are often considered a mid-range option, good for budget-conscious drivers looking for adequate dry weather performance, but might not be the best choice for demanding driving situations or wet climates.
Key points about Nexen Opera tyres:
Pros:
Affordable price point
Decent dry weather grip
Can offer good mileage depending on driving conditions
Cons:
Poor wet weather performance, particularly on aggressive driving
Potential for increased road noise
May experience uneven wear in some cases

Click to expand...

ad26kr said:

B21 said:

So the good news is that all4 wheels /tyres match…general regarded maximum tolerance front / rear is regarded about 1.5% to 2%..but since yours are the same front n rear not an issue..

Looks like the previous owner cracked his alloys and replaced them with something much cheaper…

35i/35is was never sold with a square tyre set up..so technically it’s illegal as the rears are undersized relative to what BMW specified..

In addition the the reports for this tyre in the wet are hardly glowing…

So little to redeem the situation..given the power of the 35i..the undersized rear tyres and poor wet grip I hope you have adequate life insurance and litigation cover…

Reviews for Nexen Opera tyres are generally mixed, with some users praising their value for money and decent performance in dry conditions, while others criticize their lack of grip in wet weather, particularly on higher performance vehicles, and potential concerns regarding noise levels and uneven wear depending on the specific model and driving style; overall, Nexen Opera tires are often considered a mid-range option, good for budget-conscious drivers looking for adequate dry weather performance, but might not be the best choice for demanding driving situations or wet climates.
Key points about Nexen Opera tyres:
Pros:
Affordable price point
Decent dry weather grip
Can offer good mileage depending on driving conditions
Cons:
Poor wet weather performance, particularly on aggressive driving
Potential for increased road noise
May experience uneven wear in some cases

Click to expand...

tyres,,, I would change if it doesn't fit my condition. What I was most concerned about is whether the current spec of the tyres/wheel affects the condition of DSC and mechanical drive components. If they do, I want to change the wheel and the tyres ASAP. It seems like the current setup is not that harmful to the hardware, considering several post replys including yours.

Click to expand...

B21 said:

ad26kr said:

B21 said:

So the good news is that all4 wheels /tyres match…general regarded maximum tolerance front / rear is regarded about 1.5% to 2%..but since yours are the same front n rear not an issue..

Looks like the previous owner cracked his alloys and replaced them with something much cheaper…

35i/35is was never sold with a square tyre set up..so technically it’s illegal as the rears are undersized relative to what BMW specified..

In addition the the reports for this tyre in the wet are hardly glowing…

So little to redeem the situation..given the power of the 35i..the undersized rear tyres and poor wet grip I hope you have adequate life insurance and litigation cover…

Reviews for Nexen Opera tyres are generally mixed, with some users praising their value for money and decent performance in dry conditions, while others criticize their lack of grip in wet weather, particularly on higher performance vehicles, and potential concerns regarding noise levels and uneven wear depending on the specific model and driving style; overall, Nexen Opera tires are often considered a mid-range option, good for budget-conscious drivers looking for adequate dry weather performance, but might not be the best choice for demanding driving situations or wet climates.
Key points about Nexen Opera tyres:
Pros:
Affordable price point
Decent dry weather grip
Can offer good mileage depending on driving conditions
Cons:
Poor wet weather performance, particularly on aggressive driving
Potential for increased road noise
May experience uneven wear in some cases

Click to expand...

tyres,,, I would change if it doesn't fit my condition. What I was most concerned about is whether the current spec of the tyres/wheel affects the condition of DSC and mechanical drive components. If they do, I want to change the wheel and the tyres ASAP. It seems like the current setup is not that harmful to the hardware, considering several post replys including yours.

Click to expand...

No harm will come to any mechanical or electrical system as the front / rear ratios of tyre circumference are identical..

As I said for insurance purposes you should declare the under width rear wheel / tyre set up.. :tumbleweed: :rofl:

Click to expand...

Busterboo said:

So:

1 The previous owner/someone put cheap tyres on the car, same size all round.
2 This will have caused no damage.
3 It suggests, however, that this person was either ignorant, saving money before the sale or both.
4 The 'solution' is to put good tyres of the right size on the car.
5 Then, prepare for the real problems that your E89 will have.

Click to expand...

Pondrew said:

OK.....
225/40/18 front is 9mm smaller circumference than a 225/35/19. So nothing. Not even 0.5%.

225/40/18 rear is 5mm larger circumference than a 255/30/19. So again, nothing. Not even 0.25%.

Nothing there should affect anything adversely on the car. The ONLY question is whether a 225mm width tyre is suitable for you car's handling/ power characteristics. I would say yes. It's just over an inch difference. I know some people say an inch is a lot, but that is a completely different subject!

Click to expand...