numbers for tires - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ShortGuy622 · 12-07-2003, 08:07 PM

hey you people always mention numbers on tires like 245/15/40. what do they mean? im guessin somethin about air pressure? thanks for the answers

R K e 1 C A · 12-07-2003, 08:09 PM

Check out:

http://auto.howstuffworks.com/tire2.htm

**Phlip** · 12-07-2003, 08:19 PM

Or to answer the question as answered:
Try tire size 225/45-17
225 = Section width, the tire is 225 millimeters wide, divide this by 2.54 (to change from metric to standard) and THAT by 10 (millimeters to centimeters) if you must have this number in inches...
45 = Aspect ratio, otherwise known as "profile" the sidewall section is 45% of that 225 millimeters
17 = Wheel size, the easiest part about tire sizing

S13Nissan240SX · 12-08-2003, 01:23 PM

You'll probably find this site very usefull. This link will teach you everything you want to know about tires. The site (www.tirerack.com) also has a lot of information about suspension.

http://www.tirerack.com/tires/tiretech/tiretech.htm

Best wishes,
Matt

CoasTek240 · 12-08-2003, 01:40 PM

yes i highly reccomend reading up on the tire rack link above. it'll tell you pretty much all the basics to understand, if you have any more questions feel free to ask.

12-07-2003, 08:07 PM	#1
ShortGuy622 Join Date: Jun 2003 Location: Virginia Posts: 36 Trader Rating: (0) Feedback Score: 0 reviews	numbers for tires hey you people always mention numbers on tires like 245/15/40. what do they mean? im guessin somethin about air pressure? thanks for the answers

12-07-2003, 08:19 PM	#3
Phlip Yes, I look like that Join Date: Mar 2002 Location: In my supervillain's lair Posts: 27,980 Trader Rating: (19) Rides Gallery: Phlip Feedback Score: 19 reviews	Or to answer the question as answered: Try tire size 225/45-17 225 = Section width, the tire is 225 millimeters wide, divide this by 2.54 (to change from metric to standard) and THAT by 10 (millimeters to centimeters) if you must have this number in inches... 45 = Aspect ratio, otherwise known as "profile" the sidewall section is 45% of that 225 millimeters 17 = Wheel size, the easiest part about tire sizing __________________ Weirdo And I write too!

12-07-2003, 08:09 PM	#2
R K e 1 C A Leaky Injector Join Date: Oct 2003 Location: Denver, CO Posts: 89 Trader Rating: (0) Feedback Score: 0 reviews	Check out: http://auto.howstuffworks.com/tire2.htm

12-08-2003, 01:23 PM	#4
S13Nissan240SX Leaky Injector Join Date: Jan 2003 Location: Arizona Age: 45 Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	You'll probably find this site very usefull. This link will teach you everything you want to know about tires. The site (www.tirerack.com) also has a lot of information about suspension. http://www.tirerack.com/tires/tiretech/tiretech.htm Best wishes, Matt

12-08-2003, 01:40 PM	#5
CoasTek240 Post Whore! Join Date: Jan 2002 Location: VA Age: 40 Posts: 3,034 Trader Rating: (3) Feedback Score: 3 reviews	yes i highly reccomend reading up on the tire rack link above. it'll tell you pretty much all the basics to understand, if you have any more questions feel free to ask.