Tire dimensions

gregb21 · 01-19-2018, 03:34 PM

hey guys,

New member here, bought the wife a 2012 Touring with sport package and going to have to by new tires fairly soon and wanted to run something by the forum. Has anyone ever ran tires like a 275/45r19 instead of a 275/35r19 on the rear. My thought was to give the tire a little more sidewall for a possibly smoother ride. I know its a sports car so ride quality might not be the greatest. It was just a thought and wanted to ask people have been around the car longer than I have. TIA

BGTV8 · 01-19-2018, 04:22 PM

The car requires matched diameters front to rear to within 2-3% or the electronic nannies will go off their tiny collective brains.

If you go to 275/45R19 your OD will go from 675mm to 730mm and that is way outside tolerance. The car will also ride 25-30mm taller at the rear which will affect handling

I personally would not do it

RumbleFish · 01-19-2018, 04:35 PM

you could go 245/45/19 & 275/40/19 to increase the sidewall f&r, if that's what you're after. Those sizes have virtually the same diameter & circumference.

01-19-2018, 03:34 PM	#1 (permalink)
gregb21 Base Member Join Date: Oct 2017 Location: Oklahoma Posts: 9 Drives: 2012 370Z Rep Power: 8	Tire dimensions hey guys, New member here, bought the wife a 2012 Touring with sport package and going to have to by new tires fairly soon and wanted to run something by the forum. Has anyone ever ran tires like a 275/45r19 instead of a 275/35r19 on the rear. My thought was to give the tire a little more sidewall for a possibly smoother ride. I know its a sports car so ride quality might not be the greatest. It was just a thought and wanted to ask people have been around the car longer than I have. TIA

01-19-2018, 04:35 PM	#3 (permalink)
RumbleFish Premium Member Join Date: Oct 2013 Location: Los Feliz, Ca. Posts: 1,212 Drives: '10-Sport-M6 Rep Power: 8240	you could go 245/45/19 & 275/40/19 to increase the sidewall f&r, if that's what you're after. Those sizes have virtually the same diameter & circumference. Brendan likes this. __________________ How far, this...Utopia? F.I. CBE V2/Stillen G3 CAI/GTM 25R OC/EcuTek tune (Specialty Z)/ KW V3's/Stillen Sway bars/SPC rear camber kit/Z1 FUCA/Mich. PSS4S 255/35-295/30

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01-19-2018, 04:22 PM	#2 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,514 Drives: 09 Nissan 370Z M6 Rep Power: 39973	The car requires matched diameters front to rear to within 2-3% or the electronic nannies will go off their tiny collective brains. If you go to 275/45R19 your OD will go from 675mm to 730mm and that is way outside tolerance. The car will also ride 25-30mm taller at the rear which will affect handling I personally would not do it