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04:16:18 - 04/25/2024
Raised / Lifted Dakotas
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skipdawg91
Dodge Dakota
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4/30/2003
11:50:06
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 Subject: am i screwed????
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aight, i think i screwed myself. I had an idea about backspacing before i bought my new rims, and i've been told that anywhere from 3 1/4 or more backspacing will be good to fit 33/12.0x15 with a 3 in body lift. So, when i found rims that said they had 5 1/2 in of backspacing and i liked the rim i bought them. Now, i find out that the higher the number the more tire will be under the wheel well. Am i screwed, will i ahve to get wheel spacers, or will the 5 1/2 bs work out good and leave me with minor trimming and even less rub??????? thanks in advance
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JustMe
Dodge Dakota
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4/30/2003
13:47:25
|  RE: am i screwed????
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i'm not sure where the "happy middle ground" is for backspacing. with the lower # backspacing, the tire will sit farther out of the wheel well. this changes the arc the tires make when turning. most guys have to trim the fenders to keep from rubbing. now with the higher # backspacing, the tire is closer to the frame. this brings the wheel closer to the truck. the problem you'll run into there is rubbing on the frame. no trimmin the frame though. but if i'm not mistaken, the stock rim has a 5.5" backspacing. i've heard of guys on here running 33x12.50's on stock rims and a 3" body lift. I can't exactly remember if they had any rubbing issues. i think they might have but cranked on the torsion bars to help. do a search for something like biggest tires on stock rims or something like that and i'm sure, with enough time and searching, you'll find the answer.
but to shortly answer your question, with that backspancing, i don't THINK you'll have to trim, but you MIGHT have some frame rubbing issues at full turn. Like I said before, i'm just going off of what people have said here and off of memory. so i might have some missing / bad info. just do a search. hope i could help out a little.
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WhoDat
Dodge Dakota
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4/30/2003
15:43:23
| RE: am i screwed????
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Think it will be minor if anything, like JustMe said 5.5" is stock.
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REAL ARTHUR
Dodge Dakota
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4/30/2003
15:56:42
| RE: am i screwed????
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Actually it totally depends on the width of the rims at this point. If you get rims with 5.5" backspacing and 8" wide rims, you'll be fine.
If on the other hand you get the 5.5" backspacing and 10" rims you will probably have LOTS of trouble with the rims rubbing on the frame, cause the rims will actually be 1" closer to the frame than the stock ones.
So if you got the 10" rims, you might what to think about exchanging the rims out for rims with 4.5" backspacing and either 8" or 10" rims. I think you will like the look of the 4.5" backspacing, unless you really want the rims to stick out far, then go to a lower number backspacing.
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SXT4ME
Dodge Dakota
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4/30/2003
17:07:54
| RE: am i screwed????
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Well Real Arthur, I hate to tell you but you are real wrong. 5.5" of backspacing is 5.5" of backspacing. It does not matter if the wheels are 7"8"10" wide or what ever. Think about it, a 15x8 wheel with 5.5" backspacing and a 15x10 wheel with 5.5" of backspacing both have 5.5" backspacing. What you are refering to is the offset. The offset is different. I think skipdawg may get some slight rubbing inside on the frame rail if you turn full lock to lock. If you get a wheel with less backspaceing it will stick out further and possibly rub the valence. It also may be illegal in your state to get wheels and tires that stick outside the fenders. I also thing it looks really redneck when the tires and wheels stick way outside the fenderwells. But, that is just a personal opinion. I have 15x8's with 5.00" backspacing and 32x11.5R15's and I have no rubbing on my 2002 Dakota 4x4. I have not cranked the torsion bars either.
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Walt_Felix
Dodge Dakota
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4/30/2003
17:19:33
|  RE: am i screwed????
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How a tire fits is based upon a few of different measurements. Everyone looks at the overall tire height when selecting tires but tire width; rim width and offset (backspacing) also play into the equation. When you change one of those measurements, you change the geometry of the wheel’s movement within the wheel well. As you decrease a rims backspacing, you increase the amount of lateral movement that is required for that wheel to pivot when turning. A good example is this image here. Click it to view it larger.
This is a scale drawing of a 31x10.50 tire from above. A 31” tire needs about 32” of space to pivot +/- 20 degrees if the pivot point is aligned with the centerline of the tire. Move that pivot point towards the inside edge of the rim 25%(2½”) and the same tire now needs about 34” to pivot the same +/- 20 degrees. Same hold true for both tire and rim width, as you increase the width, the more room is required for it to pivot. If you switch to a 33x12.50 tire on the stock rim, you have effectively moved the inside sidewall of the wheel in an inch which is equivalent to decreasing the backspacing an inch. You have to look at it as a trig equation.
To answer you original question, if the backspacing of the new rims are equal to the backspacing of the rims you are replacing, you basically moved the inside sidewall in about an inch with the new tires. You may or may not have some slight rubbing on the frame but it would be close. I think you should be all right.
Walt Felix
Walt@Walt-n-Ingrid.COM
http://WWW.Walt-n-Ingrid.COM
http://WWW.MoparsinMotion.COM
http://WWW.CruiseNights.Info
   
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