Tires! Help!
JK Enthusiast
Joined: Apr 2012
Posts: 397
Likes: 6
From: Calgary, AB
Numbers on a metric sized tire: 285/70/17 - 285 is the tread width in mm. 70 is the sidewall profile, meaning the sidewall is 70% of 285, which is 199.5mm. Take the sidewall profile, convert to inches and multiply by two and add 17 (the wheel size in inches) and you'll get your wheel height. So this would be a 32.7" tire that is 11.2" wide on a 17" wheel.
Stock 17" wheels have I believe 3" backspacing and are 7.5" wide. Narrow wheels help keep the sidewall of the tire in the wheel (lower PSI while wheeling) but are generally harder to mount or reseat if you lose the bead and will look like a balloon. Most people will shoot for 4.25-4.5" backspacing and either an 8 or 9" wide wheel when running 12.5" wide tires. An 8" wheel would be perfect for a 285/70/17 tire.
(some of these numbers probably aren't correct but should be close)
Stock 17" wheels have I believe 3" backspacing and are 7.5" wide. Narrow wheels help keep the sidewall of the tire in the wheel (lower PSI while wheeling) but are generally harder to mount or reseat if you lose the bead and will look like a balloon. Most people will shoot for 4.25-4.5" backspacing and either an 8 or 9" wide wheel when running 12.5" wide tires. An 8" wheel would be perfect for a 285/70/17 tire.
(some of these numbers probably aren't correct but should be close)
JK Junkie
Joined: Feb 2013
Posts: 2,013
Likes: 0
From: West Richland Washington
Numbers on a metric sized tire: 285/70/17 - 285 is the tread width in mm. 70 is the sidewall profile, meaning the sidewall is 70% of 285, which is 199.5mm. Take the sidewall profile, convert to inches and multiply by two and add 17 (the wheel size in inches) and you'll get your wheel height. So this would be a 32.7" tire that is 11.2" wide on a 17" wheel.
Stock 17" wheels have I believe 3" backspacing and are 7.5" wide. Narrow wheels help keep the sidewall of the tire in the wheel (lower PSI while wheeling) but are generally harder to mount or reseat if you lose the bead and will look like a balloon. Most people will shoot for 4.25-4.5" backspacing and either an 8 or 9" wide wheel when running 12.5" wide tires. An 8" wheel would be perfect for a 285/70/17 tire.
(some of these numbers probably aren't correct but should be close)
Stock 17" wheels have I believe 3" backspacing and are 7.5" wide. Narrow wheels help keep the sidewall of the tire in the wheel (lower PSI while wheeling) but are generally harder to mount or reseat if you lose the bead and will look like a balloon. Most people will shoot for 4.25-4.5" backspacing and either an 8 or 9" wide wheel when running 12.5" wide tires. An 8" wheel would be perfect for a 285/70/17 tire.
(some of these numbers probably aren't correct but should be close)
JK Enthusiast
Joined: Mar 2009
Posts: 152
Likes: 0
From: West Monroe, La
Numbers on a metric sized tire: 285/70/17 - 285 is the tread width in mm. 70 is the sidewall profile, meaning the sidewall is 70% of 285, which is 199.5mm. Take the sidewall profile, convert to inches and multiply by two and add 17 (the wheel size in inches) and you'll get your wheel height. So this would be a 32.7" tire that is 11.2" wide on a 17" wheel.
Stock 17" wheels have I believe 3" backspacing and are 7.5" wide. Narrow wheels help keep the sidewall of the tire in the wheel (lower PSI while wheeling) but are generally harder to mount or reseat if you lose the bead and will look like a balloon. Most people will shoot for 4.25-4.5" backspacing and either an 8 or 9" wide wheel when running 12.5" wide tires. An 8" wheel would be perfect for a 285/70/17 tire.
(some of these numbers probably aren't correct but should be close)
Stock 17" wheels have I believe 3" backspacing and are 7.5" wide. Narrow wheels help keep the sidewall of the tire in the wheel (lower PSI while wheeling) but are generally harder to mount or reseat if you lose the bead and will look like a balloon. Most people will shoot for 4.25-4.5" backspacing and either an 8 or 9" wide wheel when running 12.5" wide tires. An 8" wheel would be perfect for a 285/70/17 tire.
(some of these numbers probably aren't correct but should be close)
JK Enthusiast
Joined: Jul 2010
Posts: 111
Likes: 0
From: NW JERSEY
well explained. I would also suggest a 285/70R17(33'') tire if you don't plan on a lift. the 285/75R17 is going to be taller(closer to 34''), but slightly narrower than the 285/70R17. the great thing about this forum is that there are endless pics and discussions on every aspect of the Jk including tires. just take some time and search through the forum and i'm sure the discussions and pictures will lead you to what you are looking for. Good luck!
JK Newbie
Joined: Jul 2013
Posts: 6
Likes: 0
From: Jenks, Oklahoma
Going By The Specs
yes the 8" is just the with of the rim. some rims are wider like a 17 X 10" rim. but for the size of tires you want you a 8" rim will suffice perfectly. most tires mount on between a 7" and 10" rim easily. the wheels you want plus a 285 75 17 tire should mount and fill your tire well fine. the tire will come out to being about 33 x 11.50. x 17 in English.
