Help with winter tyre sizing!

Nitronic · 10-12-2010, 09:44 AM

I was thinking of getting a pair of winter tyres on the OEM 19" wheels (245/35 and 265/35). I prefer hardcore Nokian tyres Hakkapeliitta R for snowy Finland but I have some problems with the sizes they offer:
235/35, 245/40 or 255/40 R19.

What do you think if I get 235/35 for front 8,5" wheels and 245/40 for the rear 9,5" wheels? This will make the front 1% smaller (diameter 647.1mm) and the rear 1,5% bigger (678.6mm). Difference 31,5mm in diameter and 3.41mph in speed.

Do you think this big of a difference will cause problems? Especially with the sensor systems? BMW Finland couldn't answer my question..

Blizzak LM-60 is another hardcore tyre with right sizes but unfortunately not sold in Europe...

Help appreciated very much, thanks!

2000gsr · 10-18-2010, 12:59 PM

I'm running 235/40/18 and 255/40/18 on oem 18's and no problems whatsoever.

dcstep · 10-18-2010, 01:15 PM

I'm sure that'll work. I'm running staggard on the 18" wheels.

You seem to know those tires. They're great for areas where snow stays on the ground for most of the winter. In places, like Denver, where it snows and then quickly clears and the roads dry, I'd recommend something like the Pirelli Soto Zeros.

Reedomn · 10-18-2010, 01:28 PM

Quote:

Originally Posted by 2000gsr

I'm running 235/40/18 and 255/40/18 on oem 18's and no problems whatsoever.

+1

Prowess Symphony · 10-18-2010, 01:28 PM

Is there a need to run staggered on winters? I wanna run winters on 18s but square just to make it simple.

Reedomn · 10-18-2010, 01:55 PM

Staggared are necassary on OEM 18's....plus IMO it "looks" better.....

signes · 10-19-2010, 12:20 AM

Staggered is not necessary. Plenty of people run square setups on OEM 18s (I am one of them.) 245/40-18 Nokian Hakka R's. Best snows I've ever had.

Prowess Symphony · 10-20-2010, 12:01 PM

So I can get 18x9.0 et20 square with 245/40/18? Is that the proper tire sizes for the rims?

Nitronic · 10-28-2010, 01:39 PM

Just wanted to inform you guys that I got the 235/35 and 245/40 on the OEM 19" wheels and they with run no problemos! Staggered looks ok and the 245 on the 9,5J rear wheel doesn't even look too streched!

Thank you guys and Ben (who posted on the other thread) for encouraging me to take my chances! Nokia R's rock, though haven't got any snow yet!

10-12-2010, 09:44 AM	#1
Nitronic New Member Drives: M3 Cabrio Join Date: Oct 2010 Location: Finland Posts: 7 iTrader: (0)	Help with winter tyre sizing! I was thinking of getting a pair of winter tyres on the OEM 19" wheels (245/35 and 265/35). I prefer hardcore Nokian tyres Hakkapeliitta R for snowy Finland but I have some problems with the sizes they offer: 235/35, 245/40 or 255/40 R19. What do you think if I get 235/35 for front 8,5" wheels and 245/40 for the rear 9,5" wheels? This will make the front 1% smaller (diameter 647.1mm) and the rear 1,5% bigger (678.6mm). Difference 31,5mm in diameter and 3.41mph in speed. Do you think this big of a difference will cause problems? Especially with the sensor systems? BMW Finland couldn't answer my question.. Blizzak LM-60 is another hardcore tyre with right sizes but unfortunately not sold in Europe... Help appreciated very much, thanks!
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10-18-2010, 12:59 PM	#2
2000gsr First Lieutenant Drives: 2008 E92 M3 Join Date: Aug 2008 Location: Toronto, ON Posts: 346 iTrader: (0)	I'm running 235/40/18 and 255/40/18 on oem 18's and no problems whatsoever. __________________

10-18-2010, 01:15 PM	#3
dcstep Brigadier General Drives: '09 Cpe Silverstone FR 6MT Join Date: Nov 2008 Location: Colorado Posts: 3,934 iTrader: (0) Garage List 2009 M3 [4.00]	I'm sure that'll work. I'm running staggard on the 18" wheels. You seem to know those tires. They're great for areas where snow stays on the ground for most of the winter. In places, like Denver, where it snows and then quickly clears and the roads dry, I'd recommend something like the Pirelli Soto Zeros. __________________ Flickr Photos Ucm, Inc.

10-18-2010, 01:28 PM	#5
Prowess Symphony Major General Drives: Sportage Join Date: Nov 2008 Location: WV Posts: 5,154 iTrader: (10) Garage List 2011 BMW e93 M3 -sold [0.00] 2009 BMW 335 -sold [0.00] 2013 BMW e92 M3 [0.00]	Is there a need to run staggered on winters? I wanna run winters on 18s but square just to make it simple. __________________ 2013 e92 M3 ordered. Euro pick up on June 15th. B ///M W ---> Click For xi/xDrive Suspension Compatibility List <---

10-18-2010, 01:55 PM	#6
Reedomn Captain Drives: 1M Join Date: Feb 2008 Location: edina Posts: 641 iTrader: (12)	Staggared are necassary on OEM 18's....plus IMO it "looks" better..... __________________ VO 1M Sold- 2008 JZB/Fox E90 M3 6MT Launch car

10-19-2010, 12:20 AM	#7
signes Brigadier General Drives: E90 M3 Join Date: Sep 2008 Location: Spinnin at 8k Posts: 3,199 iTrader: (3)	Staggered is not necessary. Plenty of people run square setups on OEM 18s (I am one of them.) 245/40-18 Nokian Hakka R's. Best snows I've ever had. __________________ 08 E90 \| Jet Black / Black \| 6MT Mods: RAC RG63 w/ Pirelli Corsa 255F/285R \| Akrapovic Evo Exhaust \| OEM Blacklines Winter Setup: OEM 18s w/ Nokian Hakkapeliita R 245/40-18

10-20-2010, 12:01 PM	#8
Prowess Symphony Major General Drives: Sportage Join Date: Nov 2008 Location: WV Posts: 5,154 iTrader: (10) Garage List 2011 BMW e93 M3 -sold [0.00] 2009 BMW 335 -sold [0.00] 2013 BMW e92 M3 [0.00]	So I can get 18x9.0 et20 square with 245/40/18? Is that the proper tire sizes for the rims? __________________ 2013 e92 M3 ordered. Euro pick up on June 15th. B ///M W ---> Click For xi/xDrive Suspension Compatibility List <---

10-28-2010, 01:39 PM	#9
Nitronic New Member Drives: M3 Cabrio Join Date: Oct 2010 Location: Finland Posts: 7 iTrader: (0)	Just wanted to inform you guys that I got the 235/35 and 245/40 on the OEM 19" wheels and they with run no problemos! Staggered looks ok and the 245 on the 9,5J rear wheel doesn't even look too streched! Thank you guys and Ben (who posted on the other thread) for encouraging me to take my chances! Nokia R's rock, though haven't got any snow yet!

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