What does this mean - The 1947 - Present Chevrolet & GMC Truck Message Board Network

68gmcjon · 07-16-2002, 03:52 PM

On the tire P275/60R15 I know its tire dimensions but exactly what does each mean?

lux hauler · 07-16-2002, 04:03 PM

here is a link to The Tire Racks web site............
http://www.tirerack.com/tires/tiretech/general/size.htm

bouncytruck · 07-16-2002, 05:14 PM

I believe it is 275 mm across the tread and the side wall is 60% of that.

**ThreeQuarter** · 07-16-2002, 06:36 PM

P is for metric passenger car tire (measured in mm instead of inches). Usually these are load range B. LT is for light truck, and can come in higher load ratings. (P-metrics are OK to use on trucks.)

275mm is the section width, includes the sidewalls and whatever amount of curvature they have. Basically the measurement of the tire at it widest point, not including tire squat from a load.

Section height is 60% of 275mm. So the actual measurement depends on width--all 60 series are not the same height.

R is for radial.

15 inch rim diameter.

Longhorn Man · 07-16-2002, 06:47 PM

An interesting note, while gmcblu is 100% correct, you can take 2 tires that are supposed to be the same size from differant manufacturers, and when you measure them, they will not be the same.
makes no sence, but it is true.

07-16-2002, 03:52 PM	#1
68gmcjon Got earplugs? Join Date: Mar 2002 Location: Winfield, Kansas Posts: 556	What does this mean On the tire P275/60R15 I know its tire dimensions but exactly what does each mean?

07-16-2002, 04:03 PM	#2
lux hauler Psycho-billy Member Join Date: Jul 2001 Location: about 40 miles west of Cleveland, Ohio Posts: 2,591	here is a link to The Tire Racks web site............ http://www.tirerack.com/tires/tiretech/general/size.htm __________________ '72 C-10 350 w/Lunati Voodoo cam (207/213, .437/.454), Performer intake, 625 Road Demon Jr. and Hooker headers. Support your community, support yourself. Buy local, buy American (or Canadian).

07-16-2002, 05:14 PM	#3
bouncytruck SKINNY TIRES RULE! Join Date: Sep 2001 Location: Bothell, WA Posts: 11,038	I believe it is 275 mm across the tread and the side wall is 60% of that. __________________ bouncytruck 1972 K5 The Hauler 1994 K1500 Suburban The Daily2010 Kia Soul Wife's Ride2014 Fiat 500L

07-16-2002, 06:36 PM	#4
ThreeQuarter Senior Member Join Date: Jun 2000 Location: Texan in Iowa Posts: 2,523	P is for metric passenger car tire (measured in mm instead of inches). Usually these are load range B. LT is for light truck, and can come in higher load ratings. (P-metrics are OK to use on trucks.) 275mm is the section width, includes the sidewalls and whatever amount of curvature they have. Basically the measurement of the tire at it widest point, not including tire squat from a load. Section height is 60% of 275mm. So the actual measurement depends on width--all 60 series are not the same height. R is for radial. 15 inch rim diameter. __________________ Ben '68 Chevy C10 Custom LWB 327/TH400 2nd owner '16 GMC Sierra 1500 SLE Dblcab 4wd 5.3

07-16-2002, 06:47 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	An interesting note, while gmcblu is 100% correct, you can take 2 tires that are supposed to be the same size from differant manufacturers, and when you measure them, they will not be the same. makes no sence, but it is true.



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