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      12-30-2010, 11:29 AM   #1
andymc0001
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falken tyre sizes

The rears on my car are getting very low now so thinking about replacements. I want to go non runflat so all this talk of Falkens, i've looked at prices and sizes.

If i go 235/35/19 and 265/30/19 would there be any problems? I'm aware i'll need to buy some tyreweld, what brand is best? I already own a small 12v compressor will this do the job if i get a puncture?
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      12-30-2010, 11:56 AM   #2
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Quote:
Originally Posted by andymc0001 View Post
The rears on my car are getting very low now so thinking about replacements. I want to go non runflat so all this talk of Falkens, i've looked at prices and sizes.

If i go 235/35/19 and 265/30/19 would there be any problems? I'm aware i'll need to buy some tyreweld, what brand is best? I already own a small 12v compressor will this do the job if i get a puncture?
No problem for the Coupe lowered on those sizes.

I've run mine on both Eibach Pro Kit and Birds Spec lowered Eibachs. No rubbing.

Couple of cheap cans of Holts tyre moose in the boot for me.

Yves
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      12-30-2010, 12:22 PM   #3
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Are there any warranty/insurance implications of moving away from OEM tyre sizes?

I am going to need some new rubber fairly soon and was also thinking of FK452s all round.

andy,

The Falken is available in 225/35/19 which is what the OEM size is for the fronts. Why are you considering changing to the 235/35?

Also, by changing the rears to 265/30, will the rolling radius be changed therefore throwing your speedo off?
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      12-30-2010, 04:02 PM   #4
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I was under the impression i couldn't +1 the rear only. Thinking about it i don't see why you can't just uprate the rears. They'll be even cheaper then!!
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      12-30-2010, 04:23 PM   #5
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I've found a place called www.allnewtyres.co.uk and there price is 457 delivered for 225/35 and 265/30. I can't beat this anywhere! anyone used these before?
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      12-30-2010, 04:49 PM   #6
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Nice find andy.

Quick thing, did you give any thought to the change of the rolling diameter of the wheel and how this will affect the speedo reading?

From my calculation a change from 255/30 to 265/30 will result in a change in profile from 76.5mm to 79.5mm

So a rolling radius change of 3mm...

Awesome. Just found this:

http://www.exploroz.com/Vehicle/Tyres/SizeCalc.aspx

Which gave the following:

Results for your selected Wheel/Tyre 1 (255/30/19)

Rolling Radius 317.8mm
Circumference 1996.8mm
Diameter 635.6mm
Wheel Cover Size Size 001

Results for your selected Wheel/Tyre 2 (265/30/19)

Rolling Radius 320.8mm
Circumference 2015.65mm
Diameter 641.6mm
Wheel Cover Size Size 001

Differences between Wheel/Tyre 1 & 2

Rolling Radius 3mm
Circumference 18.85mm
Diameter 6mm

When your speedo reads 100km/hr you're actually at 100.94 km/hr

So the answer to the speedo thing, it doesnt make enough of a difference to worry about. In fact, seeing as my speed under-reads by about 2mph across the board it will actually make it slightly more accurate!

What about warranty and insurance I wonder? Is it acceptable to run a 265/30 when OEM supplied is 255/30?
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      12-30-2010, 05:15 PM   #7
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Quote:
Originally Posted by andymc0001 View Post
I've found a place called www.allnewtyres.co.uk and there price is 457 delivered for 225/35 and 265/30. I can't beat this anywhere! anyone used these before?
Thats a good price for the Falkens.

Just for the record, even though its not recommended by people on here, I run OEM size Falkens on the front and 265/30 Falkens on the rear.
Had no problems and would probably do the same again.
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      12-30-2010, 05:32 PM   #8
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Quote:
Originally Posted by chris_s1 View Post
Thats a good price for the Falkens.

Just for the record, even though its not recommended by people on here, I run OEM size Falkens on the front and 265/30 Falkens on the rear.
Had no problems and would probably do the same again.
Is there a reason that people don't recommend it?

I hadn't realised that was the case to be honest, if there's a reason that running 235/35 on the front woud be better then I'm all ears....
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      12-30-2010, 06:01 PM   #9
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I think that they assume its going to affect the balance of the handling, because you are increasing the amount of rubber on the road at the back but not at the front.

I haven't noticed any such effects, I don't think the change is big enough to have any real effect
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      12-30-2010, 06:07 PM   #10
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Hrm,

I can see the logic I guess, you're increasing the contact patch by 10mm in width at each rear corner, so 20mm in total at the back (assuming the entire width of the tyre actually makes contact with the road).

I'm guessing this would give the rear an excess of grip compared to before and this could I guess unbalance the car unless you give the front the extra contact area too?

I'm just thinking out loud...hopefully someone more knowledge will come along and enlighten us.
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      12-31-2010, 05:02 AM   #11
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Quote:
Originally Posted by andymc0001 View Post
I've found a place called www.allnewtyres.co.uk and there price is 457 delivered for 225/35 and 265/30. I can't beat this anywhere! anyone used these before?
Andy, the price of Falkens was discussed a couple of days ago in this thread:
http://www.e90post.com/forums/showthread.php?t=470038

and for 19's in 235/265 the price was 443.16 which I thought was a cracking price.

Alpina use the above sizes as standard and many forum members run the same.
If you/others didn't already know, the Falkens are not available in the 255 size.
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      12-31-2010, 04:35 PM   #12
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Was that price not for 18's?

allnewtyres is located in macclesfield, i work at mcr airport so can collect and save myself 20. I'll go with the 235/265. if they're good enough for alpina then i can't argue.

We know they're not available in 255 thats why we're talking about 265's and the possible affects of running with 225 / 235.

Last edited by andymc0001; 12-31-2010 at 04:39 PM. Reason: to complete post
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      12-31-2010, 04:50 PM   #13
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Quote:
Originally Posted by andymc0001 View Post
Was that price not for 18's?

allnewtyres is located in macclesfield, i work at mcr airport so can collect and save myself 20. I'll go with the 235/265. if they're good enough for alpina then i can't argue.
Word of caution....

Cant speak for Falken 452's in this size but I have tried Conti SC3 in 265/35 as per Alpina AND THEY RUB ON THE COUPE!

The Contis are very tall in that size, the puny little tyre in the middle is a Vred Sessanta in size 265/30 19..........

My rims were 9.5j rear and 35 offset by the way. Alpina rims are narrower and have different offsets to accommodate the larger tyre.

Cheers

Yves
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      12-31-2010, 04:56 PM   #14
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But as your picture shows, 265/35/19 is much taller than 265/30/19. So 265/30/19 on OEM wheels is not a problem.
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      12-31-2010, 05:02 PM   #15
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Quote:
Originally Posted by remmib View Post
But as your picture shows, 265/35/19 is much taller than 265/30/19. So 265/30/19 on OEM wheels is not a problem.
Correct, for reference, the tyre and rim mounted on the car are stock 255/35's. Barely any difference in roilling diameter to the Vreds.
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      12-31-2010, 05:02 PM   #16
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i'll go for the puny ones! bloody hell what a difference.
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      12-31-2010, 05:05 PM   #17
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Quote:
Originally Posted by andymc0001 View Post
i'll go for the puny ones! bloody hell what a difference.
Has to be seen in the flesh to be truly appreciated.

Humongos difference.
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      12-31-2010, 05:08 PM   #18
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The difference between 265/30 and 265/35 is 13.25mm, and that's RADIUS.

So double it for diameter. That's quite a difference, 26.5mm in fact. That picture looks odd though, the difference looks massive!!!
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      12-31-2010, 05:11 PM   #19
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Quote:
Originally Posted by toxicnerve View Post
That picture looks odd though, the difference looks massive!!!
It is. Cost me a few hundred quid to find out the hard way.

Dont make the same mistake
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      12-31-2010, 05:18 PM   #20
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Quote:
Originally Posted by YvesD View Post
It is. Cost me a few hundred quid to find out the hard way.

Dont make the same mistake
Heres some more pics showing how bulbous they are in the side profile too.

The worst rubbing is where the bumper meets the rear arch.

Yeah, I know the cars filthy, sorry.
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      12-31-2010, 05:20 PM   #21
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No one has commented re the warranty/insurance implications of moving away from OEM sizes.

I take it those of you who have changed have not worried about it?
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      12-31-2010, 05:26 PM   #22
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Not that I'm any expert, but I read before the insurance companies were not very accomodating when drivers moved away for the factory run flats?

There was a feature on the news just a few weeks ago warning drivers about winter tyres and winter driving aids.

Even though they effectively made you safer on the snow covered roads, the insurance companies were not covering drivers who had fitted snow tyres. Bonkers.
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