Stock wheel offset with 1" 1/2 wheel spacers
12-04-2016, 05:49 PM
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Stock wheel offset with 1" 1/2 wheel spacers
Right now I am running 35' x 12.50 with 1" 1/2 wheel spacers on the stock rubicon wheels.
Does anyone know what offset that would equal to on a wheel?
I am looking at a set of wheels now and its showing a 4.75 offset.
Kind of want to stay around the setup I have now as its almost flush with the fender flares.
We can't have tires stick out past the fender flares here in Cali, I think 1" past the flares would be fine, but anything more and they will most likely make you run mud flaps, etc.
Any help would be appreciated.
Does anyone know what offset that would equal to on a wheel?
I am looking at a set of wheels now and its showing a 4.75 offset.
Kind of want to stay around the setup I have now as its almost flush with the fender flares.
We can't have tires stick out past the fender flares here in Cali, I think 1" past the flares would be fine, but anything more and they will most likely make you run mud flaps, etc.
Any help would be appreciated.
12-04-2016, 06:38 PM
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Right now I am running 35' x 12.50 with 1" 1/2 wheel spacers on the stock rubicon wheels. Does anyone know what offset that would equal to on a wheel? I am looking at a set of wheels now and its showing a 4.75 offset. Kind of want to stay around the setup I have now as its almost flush with the fender flares. We can't have tires stick out past the fender flares here in Cali, I think 1" past the flares would be fine, but anything more and they will most likely make you run mud flaps, etc. Any help would be appreciated.
12-04-2016, 06:44 PM
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I can't address the tires sticking out past the flares problem. I live in Cali too. But I've yet to be harassed. I cut my fenders and the tires stick out a good two inches or so. I doubt it'll be an issue. Plus I'm not riding high. I'm not "ridin dirty". So I wouldn't care if I got pulled over. I'll address it if/when I have to.
12-04-2016, 07:55 PM
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Offset can be tricky, since it uses the specific rim width in the formula to determine how far in/out they will move. If you are looking at rims that only give Offset, do a quick online search for 'offset to backspace' converters/calculators/charts.
Ex.
8" wide rim: 12 offset = 5" backspace
10" wide rim: 12 offset = 6" backspace
Also remember that there can be a rather large difference in actual measured height and width between tires from different mfg's, even though they have the same stated size. So just because a certain tire size/backspace combo works for someone else, doesn't necessarily mean it will for you.
Ex.
8" wide rim: 12 offset = 5" backspace
10" wide rim: 12 offset = 6" backspace
Also remember that there can be a rather large difference in actual measured height and width between tires from different mfg's, even though they have the same stated size. So just because a certain tire size/backspace combo works for someone else, doesn't necessarily mean it will for you.
12-04-2016, 09:40 PM
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I think there are a few misconceptions here. First off u MIT be confusing offset with backspacing. In the jeep world we don't care about offset as much as a civic hotrod guy does. So... with that out of the way... I believe stock Rubi wheels are 6.25 BS. With 1.5" spacers that puts u at 4.75. I bet u rub on the frame and sway bar huh? I do... and I have 4.5" of BS with 12.5s. So... if u wanna keep those 35x12.5 tires, I'd go 4.5 at least. Wheels with 4.25 would better. Add a lift... now ur talking!!!
Yeah sounds like 4.25 is where I want be on this.
Thanks.
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12-04-2016, 11:05 PM
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Offset can be tricky, since it uses the specific rim width in the formula to determine how far in/out they will move. If you are looking at rims that only give Offset, do a quick online search for 'offset to backspace' converters/calculators/charts.
Ex.
8" wide rim: 12 offset = 5" backspace
10" wide rim: 12 offset = 6" backspace
Also remember that there can be a rather large difference in actual measured height and width between tires from different mfg's, even though they have the same stated size. So just because a certain tire size/backspace combo works for someone else, doesn't necessarily mean it will for you.
Ex.
8" wide rim: 12 offset = 5" backspace
10" wide rim: 12 offset = 6" backspace
Also remember that there can be a rather large difference in actual measured height and width between tires from different mfg's, even though they have the same stated size. So just because a certain tire size/backspace combo works for someone else, doesn't necessarily mean it will for you.
hmm, so the factory wheel is 7.5" wide, if going to a 9" width wheel do I need to take into account the width of the wheel as well? (e.g the additional 1.5"? ) Will this also affect how far the tire sticks out past the fender?
One of the wheels I am looking at is a 17x9 with a 4.7 backspacing.
My current setup is the stock 17 x 7.5 stock rubicon wheels with 1 1/2" wheel spacers. Sits pretty much flush with the fender flares now, maybe 1/2" past them.
I have a 2.5 Teraflex coil lift.
Thanks again, the help is much appreciated.
12-05-2016, 12:07 AM
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err, unless the tires are narrower than the rims, the actual rim width probably isn't much of a consideration. Lower backspacing moves the entire rim further out, and the section width of the tire will determine how wide the tires are. So with a 12.50" tread width, which is probably a 13-13.5" overall width, I would think that regardless of whether it is on a 10" wide rim, or an 8" wide rim, you still have several inches of tire sticking out further than the rims.
As someone else mentioned, stock rims should be around a 6.25" backspace. (that is what is stated in the faq's, anyway). Subtract the 1.50" spacer, and you have an effective 4.75" backspace right now. So if you put your current tires on rims with a 4.70 backspace, you shouldn't notice any difference at all as far as how far out the tires sit. A 4.5" backspace would be another 1/4 inch sticking out. A 4.0" bs would be another 1/2 inch sticking out. Much easier than trying to figure it out with offsets...
As someone else mentioned, stock rims should be around a 6.25" backspace. (that is what is stated in the faq's, anyway). Subtract the 1.50" spacer, and you have an effective 4.75" backspace right now. So if you put your current tires on rims with a 4.70 backspace, you shouldn't notice any difference at all as far as how far out the tires sit. A 4.5" backspace would be another 1/4 inch sticking out. A 4.0" bs would be another 1/2 inch sticking out. Much easier than trying to figure it out with offsets...
Last edited by nthinuf; 12-05-2016 at 12:11 AM.
12-05-2016, 12:54 AM
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err, unless the tires are narrower than the rims, the actual rim width probably isn't much of a consideration. Lower backspacing moves the entire rim further out, and the section width of the tire will determine how wide the tires are. So with a 12.50" tread width, which is probably a 13-13.5" overall width, I would think that regardless of whether it is on a 10" wide rim, or an 8" wide rim, you still have several inches of tire sticking out further than the rims.
As someone else mentioned, stock rims should be around a 6.25" backspace. (that is what is stated in the faq's, anyway). Subtract the 1.50" spacer, and you have an effective 4.75" backspace right now. So if you put your current tires on rims with a 4.70 backspace, you shouldn't notice any difference at all as far as how far out the tires sit. A 4.5" backspace would be another 1/4 inch sticking out. A 4.0" bs would be another 1/2 inch sticking out. Much easier than trying to figure it out with offsets...
As someone else mentioned, stock rims should be around a 6.25" backspace. (that is what is stated in the faq's, anyway). Subtract the 1.50" spacer, and you have an effective 4.75" backspace right now. So if you put your current tires on rims with a 4.70 backspace, you shouldn't notice any difference at all as far as how far out the tires sit. A 4.5" backspace would be another 1/4 inch sticking out. A 4.0" bs would be another 1/2 inch sticking out. Much easier than trying to figure it out with offsets...
Thanks for the help, much appreciated.