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  #1  
Old 10-25-2013, 06:12 PM
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Default Need help with lift, tires, and wheels

HELP PLEASE!! I'm looking at putting tires/wheels on my truck and maybe a SMALL lift. I would like my tires to stick out a little bit but I don't understand the offset/ backspace thing on wheels?? I pull a 5th wheel that already has a pretty steep angle so I cant go too big with this truck. 2013 Ram 2500
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Old 10-25-2013, 08:55 PM
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So how much do you want to go up?

As for the backspacing thing, offset is either positive or negative or in between at zero. Zero means the mounting surface of the wheel is in the center of the rim. Positive means that it is sitting closer inward. And negative is obviously outward of the center line. The more positive, the further in it sits. The more negative, the further out it sits. So for Ram 1500 Sport w the 20 x 9 rims, the offset is +19. Which means the rim is sitting 19mm further in than the center of the rim. So if I go w a -12mm offset on the same size rim, it will sit 31mm further out than my stock rims.

Backspacing is another way to measure the same thing really. Here is a chart that shows the backspacing in relation to offset and wheel width.

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Old 10-25-2013, 09:06 PM
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So start w how much lift you want. That will determine how much tire you want to put under it and what rim. Remember if you go w a wider tire, half of it will be on the inside so it will only stick out half as much as its increase in width over your stockers. So mine are 275/60/20. If I go up to a 295/60/20, it will stick out ten mm more than my stockers.
So to calculate how much new wheels and tires will stick out, decide how much you want them to stick out and then shop accordingly. Maybe drop a level from your fender lip down to the ground and measure in from that to the fattest part of the tire. Lets call that an inch for the sake of argument. Then add whatever you want them to stick out. Lets say another inch. So you need to come up w two inches of increase between wheel and tire combo. I don't know what your stock wheels are. But if they are a +25 offset for example, you can shop for a wheel w a lower offset but decide how wide of a tire you want and try to make up the difference w either a wider rim or wider w a lower offset ot the same size rim w a lower offset.
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Old 10-25-2013, 09:10 PM
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You're leaving this pretty wide open....

What exactly do you think a small lift is? 2"? 3"? 4"? To me it sounds like you just want a leveling kit so we're look at about 2.5" lift. There's multiple ways to achieve that... You can go cheap and just put Hell Bent Steel spacers on there and call it a day. Or you can do it right and get 2.5" lift coils, new shocks, and an adjustable track bar. If you plan on leaving it leveled I highly recommend the second option. Check out Top Gun Customz 2.5" progressive rate coils, Bilstein 5100 shocks, and a BD Diesel adjustable track bar. That would be a really nice set up to level your truck.

Now wheels and tires are even more wide open. How far do you want to stick out? How big of tires do you want to run? What kind of tires do you want to run? Answer those and then we'll have an idea of what you're thinking and we can give you some suggestions.
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Old 10-25-2013, 09:18 PM
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I recommend a Rough Country 2.5" level, 20x9 rims as close to zero offset, and 35x12.50x20 tire. It will stick out an inch or so past the fender. Maybe a bit more if the tread is aggressive. It might rub at full lock on the inner fender plastic which is a simple trim job.
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Old 10-25-2013, 09:22 PM
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Lol. Me and Brandon love answering these types of questions so you'll likely get similar info from both of us. But at the end of the day, your budget, your truck. Give us as much info as you can and we'll both do what we can to help you out.
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Old 10-25-2013, 10:04 PM
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Quote:
Originally Posted by LowUFO View Post
I recommend a Rough Country 2.5" level, 20x9 rims as close to zero offset, and 35x12.50x20 tire. It will stick out an inch or so past the fender. Maybe a bit more if the tread is aggressive. It might rub at full lock on the inner fender plastic which is a simple trim job.
Quote:
Originally Posted by LowUFO View Post
Lol. Me and Brandon love answering these types of questions so you'll likely get similar info from both of us. But at the end of the day, your budget, your truck. Give us as much info as you can and we'll both do what we can to help you out.
Yup, we're often on the same page when it comes to these threads. Lol.

Remember we're talking about a 2500 in this case though. So he isn't going to have rubbing issues running 35x12.5's with a leveling kit. The most likely place he'll rub is the control arms but that all depends on what offset wheel he goes with.
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Old 10-25-2013, 11:06 PM
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I've seen a guy on Cumminsforums (with a 2013) who had that exact issue. He was running that combo and the tires were mud terrains of some kind w a +1 offset rim. That's why I think it depends on his tire choice.
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Old 10-25-2013, 11:26 PM
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Quote:
Originally Posted by LowUFO View Post
So how much do you want to go up?

As for the backspacing thing, offset is either positive or negative or in between at zero. Zero means the mounting surface of the wheel is in the center of the rim. Positive means that it is sitting closer inward. And negative is obviously outward of the center line. The more positive, the further in it sits. The more negative, the further out it sits. So for Ram 1500 Sport w the 20 x 9 rims, the offset is +19. Which means the rim is sitting 19mm further in than the center of the rim. So if I go w a -12mm offset on the same size rim, it will sit 31mm further out than my stock rims.

Backspacing is another way to measure the same thing really. Here is a chart that shows the backspacing in relation to offset and wheel width.

very nice chart this is good info I would suggest anyone interested in wheels and tires or who may have questions to save this and reference it! If for whatever reason the image location above is moved this same chart is hosted on our website you can find it here

http://bullysperformance.com/images/offset.gif

I would agree with what has been stated above as well

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Old 10-26-2013, 05:35 PM
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Ok, I do know I want to stay with 17" wheels and currently have 265/70/17. I think its best to stay with no lift or maybe 2-3" so I don't put my camper in too much of a bind. Cost is an issue for sure as we are trying to pay for a wedding at the same time. Right now I have found some 17x8.5" Dick Cepek Torque Gunmetal wheels with 33x12.5x17 Dick Cepek Radial Fun country 2 tires but didn't know what kind of lift it would require to run those. The Backspacing on those wheels is 5" and the offset is 6mm. About how far will those stick out? As you can see in my pics I have those 5" nerf bars that I think look silly right now so I gotta do something to fix this problem. Thanks!
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