Different profiles on rears?

Zippeh · 09-10-2010, 04:24 AM

I'm keen to upgrade my 17'' wheels to 19'' Star 230 types. I've seen some for sale, but the tyres are described as 225/35/19 on the fronts but 255/30/19 on the rear. Is this normal??

Thanks,

marcel b · 09-10-2010, 05:03 AM

yes this is completely normal and a standard BMW size. the 30 and 35 indicate the hight of the tirewall as a percentage of the width. So a 225x35x19 has about the same height as the 255x30x19.

Zippeh · 09-10-2010, 07:30 AM

Aaah I see! I always thought the profile was an actual dimension in mm!

Learn something new everyday!

Thanks a lot

VMRWheels · 09-10-2010, 03:08 PM

Quote:

Originally Posted by Zippeh

Aaah I see! I always thought the profile was an actual dimension in mm!

Learn something new everyday!

Thanks a lot

The sidewall aspect ratio decreases in the rear to accommodate for the wider rear tire so that the overall rolling diameter stays closest to OEM sizing.

-Charles@VMRWheels

Mr. ///M3 RD · 09-10-2010, 04:31 PM

Quote:

Originally Posted by Zippeh

I'm keen to upgrade my 17'' wheels to 19'' Star 230 types. I've seen some for sale, but the tyres are described as 225/35/19 on the fronts but 255/30/19 on the rear. Is this normal??

Thanks,

I have 225/35/19 on the fronts and 255/30/19 on the rear of my Z4 it is the normal Z4 OEM sizing for my car ... for yours you need to check.

cruvon · 10-05-2010, 07:01 AM

Hi,so what is the Z or Y that goes along with those sizes? Can I use either even if the specified size is a Y,
Thanks

TurboBimmer · 10-05-2010, 07:39 AM

The letter the speed rating of the tire.

L 75 mph
M 81 mph
N 87 mph
P 93 mph
Q 99 mph
R 106 mph
S 112 mph
T 118 mph
U 124 mph
H 130 mph
V 149 mph
W 168 mph
Y 186 mph

09-10-2010, 04:24 AM	#1
Zippeh Captain 342 Rep 926 Posts Drives: F82 M4 Manual 2015 Join Date: Jun 2010 Location: North Wales iTrader: (0)	Different profiles on rears? I'm keen to upgrade my 17'' wheels to 19'' Star 230 types. I've seen some for sale, but the tyres are described as 225/35/19 on the fronts but 255/30/19 on the rear. Is this normal?? Thanks,
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09-10-2010, 05:03 AM	#2
marcel b Lieutenant Colonel 137 Rep 1,898 Posts Drives: F31 340i Join Date: Jun 2009 Location: Europe iTrader: (0)	yes this is completely normal and a standard BMW size. the 30 and 35 indicate the hight of the tirewall as a percentage of the width. So a 225x35x19 has about the same height as the 255x30x19.
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09-10-2010, 07:30 AM	#3
Zippeh Captain 342 Rep 926 Posts Drives: F82 M4 Manual 2015 Join Date: Jun 2010 Location: North Wales iTrader: (0)	Aaah I see! I always thought the profile was an actual dimension in mm! Learn something new everyday! Thanks a lot
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10-05-2010, 07:01 AM	#6
cruvon Lieutenant Colonel 83 Rep 1,543 Posts Drives: E90 Join Date: Feb 2010 Location: Sydney, Australia iTrader: (1)	Hi,so what is the Z or Y that goes along with those sizes? Can I use either even if the specified size is a Y, Thanks __________________ Tiag E90 \| JBSPEED Spli t t ers \| JBSPEED ACS style Roof Spoiler \| JBSPEED M3 style Trunk spoiler \| Euro plates \| K&N Intake \| BMW OEM Performance Exhaust \| Debadged \| OEM Chromeline trim \|230 OEM rims \| 19" Michelin Pilot Sport PS2 Non runflats \| OEM Burr Walnut Gear knob \| OEM Blacklines \| OEM Spacesaver \|
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10-05-2010, 07:39 AM	#7
TurboBimmer Lieutenant Colonel 78 Rep 1,617 Posts Drives: F82 M4 Join Date: Mar 2009 Location: Luxembourg iTrader: (5)	The letter the speed rating of the tire. L 75 mph M 81 mph N 87 mph P 93 mph Q 99 mph R 106 mph S 112 mph T 118 mph U 124 mph H 130 mph V 149 mph W 168 mph Y 186 mph __________________ Performance Seats, Exhaust, Splitters, Pedals, Steering Wheel / RB Turbos / M3 CF Roof / Brembo GT BBK 355/345 / Rollcage / Forge FMIC / Quaife LSD / Öhlins Road & Track / M3 Suspension Parts / Solid Subframe Bushings / Vorshlag Camberplates / Megan Racing Toe Links / LeatherZ Gauges / Extended M3 DCT Paddles / ER Sports OC / AR OC / Aux Radiator / AR DPs / Alpina TCU / COBB Pro-Tune
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