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Old 03-22-2011, 09:44 PM   #1
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Need help with lift, tires etc...

Hey Guys, just bought a 2010 wrangler sahara, want to upgrade lift and tires... Anyways been doing alot of research and im going to get the 2 inch old man emu lift light duty... Question is should I go with 35 or 33 inch tires? I already purchased some 17x9 rugged wheels so now I just need the tires and Lift... A few websites say the max tire is 35 but is that pushing the limit? So should I go with the 33 or 35 in tires and even light or heavy duty on the old man emu kit? Thanks for any help guys!

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Old 03-22-2011, 11:13 PM   #2
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Up to you. There's not a "right" answer.

32 is a stock size, so 33s are only slightly larger.

35s will look great, but will also wreck your gas mileage and acceleration, and you'll almost certainly start looking for a regearing soon after. So you should budget for that too.

For either size, it would also be in your interest to get a programmer to fix you speedometer.

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Old 03-22-2011, 11:25 PM   #3
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If you up to 35s, don't for get to get some C-gussets...
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Old 03-23-2011, 08:25 AM   #4
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Thanks again guys for all the help, I kind of felt like I was going into this blind... I found C gussets online, they seem to be fairly cheap im going to get an estimate on those today... As for gears, I honestly know nothing about them... What should I get or is this a necessity?
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Old 03-23-2011, 09:21 AM   #5
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Quote:
Originally Posted by Gump3842k
As for gears, I honestly know nothing about them... What should I get or is this a necessity?
I haven't gone to bigger tires yet so I can't speak from experience. However, as I understand it gears are not technically a necessity (ie, your Jeep will still drive), but you'll be miserable without them if you put on 35s. Your gas mileage will be abysmal and you'll have very little power.

At best, with a 2010 Sahara you've got 3.73s. More likely, you've got 3.21s. You'd want at least 4.56s, 4.88s, or maybe even something above 5 to feel like your Jeep accelerates like it does now with 35s. Otherwise you'll be standing on the gas pedal just to keep at 60 mph.

With parts and installation, I understand it is usually about a $1500 job. Someone with first hand experience may correct me.

There are a lot of posts on the topic. Try searching the JK section for the word "regear."
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Old 03-23-2011, 09:54 AM   #6
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Quote:
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Up to you. There's not a "right" answer.

32 is a stock size, so 33s are only slightly larger.

35s will look great, but will also wreck your gas mileage and acceleration, and you'll almost certainly start looking for a regearing soon after. So you should budget for that too.

For either size, it would also be in your interest to get a programmer to fix you speedometer.
Mileage isn't as bad as it appears if the speedo isn't recalibrated. As for gearing, it depends on what you expect and the terrain you travel regularly. I have 33's on 3:07's and everyone said I'd be ready to eat a bullet with them... well, lucky for me, everyone was wrong It's not ideal, but it's not worth the $ to regear for my needs.
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Old 03-23-2011, 10:33 AM   #7
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With 35s you will also have to address your spare tire carrier. The excess weight will wear out the stock one over time.

I plan on 35s, but I put on 33s. now I am working on the regear, lockers, upgrade axle, and rear bumper with tire carrier. I When I am done with all that will see how worn my tires are and see if I am ready for 35s.
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Old 03-23-2011, 11:26 AM   #8
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so if I go with 33x 12.50s... I can wait on the gearing?
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Old 03-23-2011, 11:28 AM   #9
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I guess the only thing I dont want is to get the OME 2 inch lift and it actually be more then 2 inches like most say and then put on 33 inch tires and it not look right
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Old 03-23-2011, 11:35 AM   #10
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You've got to make sure your wheels have the backspacing to handle that wide of a tire, otherwise you'll rub on turns.

But I'd say you'll be alright without a regearing. Just understand that you're not really getting the "most" out of your Jeep in terms of performance. Take a look at this chart. As you can see, the 3.21 gearing is already geared too light, even just for 32s. (It's no coincidence that the flagship Wrangler--the Rubicon--comes with 4.10 gearing, which is really ideal for 32s.) The bigger you take your tires, the worse the effects of this will be.

I don't ever plan to go above 33s, but I'm going to eventually regear to 4.56 anyway.
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Old 03-23-2011, 12:47 PM   #11
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Quote:
Originally Posted by Gump3842k View Post
I guess the only thing I dont want is to get the OME 2 inch lift and it actually be more then 2 inches like most say and then put on 33 inch tires and it not look right
Here is my rig on TF 3" coils, which gave me 4.75" of lift



Here is the same rig on TF 2.5" coils which gave me a bit over 3" of lift



Same 33" tires in each shot. Don't think either looks silly.
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Old 03-23-2011, 07:52 PM   #12
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Quote:
Originally Posted by Gump3842k View Post
Thanks again guys for all the help, I kind of felt like I was going into this blind... I found C gussets online, they seem to be fairly cheap im going to get an estimate on those today... As for gears, I honestly know nothing about them... What should I get or is this a necessity?
Do you have an auto or a standard transmission?

If you have a standard and will go with 35s do 4.88s.
If you have a standard and will go with 33s do 4.56s, but good luck finding them
If you have an auto and will go with 35s do 5.13s.
If you have an auto and will go with 33s do 4.88s.

As far as gas mileage goes, just remember if you have a standard transmission and gear too low (numerically higher) then you can get worse gas mileage. Ask me how I know
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Old 03-23-2011, 08:07 PM   #13
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Quote:
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...Take a look at this chart...
Not to take away from the rest of your point, because I think you're spot on. But...

That chart isn't applicable for the JK since it assuming gearing of 1:1... this would only be true for standards if they never used 6th gear. I'm not sure about autos, but it'd be wrong for them too more than likely.

For reference, I have 35s and 5.13 gears, driving 65 (which is what the chart is based off of) in 6th gear, I am running at 2,900 RPMs.
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Old 03-23-2011, 09:03 PM   #14
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Quote:
Originally Posted by u-joint

Not to take away from the rest of your point, because I think you're spot on. But...

That chart isn't applicable for the JK since it assuming gearing of 1:1... this would only be true for standards if they never used 6th gear.
Good advice. There's a chart that was posted today in the "Gears" thread that's just for JKs that provides more spot on calculations (or should anyway). Thanks for picking the issue up.
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Old 03-23-2011, 09:31 PM   #15
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Good advice. There's a chart that was posted today in the "Gears" thread that's just for JKs that provides more spot on calculations (or should anyway). Thanks for picking the issue up.

Here is the link for the Jeep Ratio Calculators
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Old 03-23-2011, 11:50 PM   #16
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Here is the link for the Jeep Ratio Calculators
Again, if an auto had OD off or a standard didn't use 6th, that chart would be correct.

Unfortunately that chart is the same as the previous chart, and assumes that top gear is 1:1. The JK features a 0.84 6th gear in standard transmissions, and a 0.69 gear in OD on autos.

I don't mean to rant, or steer the conversation off course, but any chart that assumes 1:1 is only going to mislead someone into under gearing their JK.

To steal a chart from another thread on this forum (this thread: http://www.wranglerforum.com/f33/gear-75814.html), this is the chart that JK owners should really look at:

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Old 03-24-2011, 11:21 AM   #17
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Do you have an auto or a standard transmission?

If you have a standard and will go with 35s do 4.88s.
If you have a standard and will go with 33s do 4.56s, but good luck finding them
If you have an auto and will go with 35s do 5.13s.
If you have an auto and will go with 33s do 4.88s.

As far as gas mileage goes, just remember if you have a standard transmission and gear too low (numerically higher) then you can get worse gas mileage. Ask me how I know
The only thing I would add is if you are planning on doing a lot of rock crawling, might want to go 4.88 over 5.13s for more durability if you have a d30 front diff
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Old 03-26-2011, 07:24 PM   #18
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Ok guys, I have decided to go with the 33's... makes life easier... with the lift kit do I need anything else besides the coils and shocks? Trackbars? or bumpstops?
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Old 03-26-2011, 07:48 PM   #19
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If you are doing a coil swap, I would definately put bumpstops in the front. The front ones fit inside the coils, so you have to pull them to install. So if you are pulling them anyway, I would add them. PITA to do it later.

The rear ones fit outside and you can do them anytime. A rear track bar bracket is a thought, but as far as trackbars, you can wait and see how it handles and then decide IMO
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Old 03-26-2011, 07:50 PM   #20
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Well I found the 2 inch lift at northridge 4x4 with trackbars and its a pretty good deal... After some research I notice people talking about the jeep being more level in front... Does the lift give you a little more in the front?
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Old 03-26-2011, 07:58 PM   #21
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usually, yes, the lifts fix that. It has never bothered me though.

Don't get me wrong - track bars are a good idea - I put them on my rig; just may not be necessary. You will handle better with them. JKS is as good a trackbar as any
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Old 03-26-2011, 08:04 PM   #22
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Grog just want to say thanks a ton man... One last thing if I keep the 18 inch stock sahara wheels with 33.50 tires and get wheel spacers, will I have any rib issues? Or do I need wheels with backspacing?
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Old 03-26-2011, 08:09 PM   #23
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You will probably need spacers, but I have always run aftermarket wheels so I don't have any experience with spacers.

I think if you price them out, 17" wheels and tires will coast about as much as a set of 18" tires. Definately if you include spacers, which is why I always run aftermarket wheels. 18" tires are dang expensive

Maybe someone with spacer experience will post
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Old 03-26-2011, 08:27 PM   #24
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I have a set of jk spacers for sale.... . Brand new, only one box was opened. Let me know if you're intrlerested.

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