Tire Size?

CaliJ1 · 12-18-2003, 05:54 PM

I apologize in advance for my ignorance, but what does it exactly mean when a tire says 245/45. I have a 250/40 17" on my 99 gt with cobra rims. i am looking in to getting new tires and was wondering if I have to get 250/40's to fit my wheels? Thanks for the help.

91redlx50 · 12-18-2003, 10:36 PM

you should be able to fit 255/40/17 sized tires.the first number in the size (255)is the width of the tire tread measured in millimeters.by the way tire width always end in 5s never 0s Ex. 255,265,275. the second is the aspect ratio.It is the percentage of the height treadwidth of the sidewall.The sidewall height is 40
percent of the width of the tread.obviously the last is the rim size

blue00gt · 12-19-2003, 03:35 PM

My Pace Car wheels had tires with a width ending in 0. 220/55R390 - damn metric crap.

12-18-2003, 05:54 PM	#1
CaliJ1 Registered Member Join Date: Aug 2001 Location: Goleta, Ca, USA Posts: 17	Tire Size? I apologize in advance for my ignorance, but what does it exactly mean when a tire says 245/45. I have a 250/40 17" on my 99 gt with cobra rims. i am looking in to getting new tires and was wondering if I have to get 250/40's to fit my wheels? Thanks for the help.

12-18-2003, 10:36 PM	#2
91redlx50 Registered Member Join Date: Mar 2003 Location: Meadowlands,NJ Posts: 11	tire size you should be able to fit 255/40/17 sized tires.the first number in the size (255)is the width of the tire tread measured in millimeters.by the way tire width always end in 5s never 0s Ex. 255,265,275. the second is the aspect ratio.It is the percentage of the height treadwidth of the sidewall.The sidewall height is 40 percent of the width of the tread.obviously the last is the rim size __________________ 91 LX 5.0 K&N AIR FILTER PERFORMANCE CHIP HOMEMADE CAI FLOWMASTER CAT-BACK Coming Soon: T-5 conversion UPR shifter 3.90 GEARS Coming Later: T-44 single turbo kit T-56

12-19-2003, 03:35 PM	#3
blue00gt Mustang Addict Join Date: Jan 2001 Location: McKinney, TX Posts: 1,294	My Pace Car wheels had tires with a width ending in 0. 220/55R390 - damn metric crap. __________________ Strike down the unroadworthy! 2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more '94 Rio Red Cobra: All the bolt-ons, 3.73s

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Best Tire Size 17" Rims	techsan	Windsor Power	2	03-28-2003 11:48 AM
How do I choose the right tire size?!	90LxDroptop	Windsor Power	4	12-27-2001 10:49 PM
5 inch rim what size tire	Pirate209	Windsor Power	1	05-24-2001 12:03 AM
Nitto tire size, wheel size, etc.	2FastLX	Windsor Power	7	02-15-2001 04:04 AM
TIRE SIZE ?	GIL.S/R40	Classic Mustangs	2	01-04-2001 12:05 PM