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Author Topic: Dilema with Tires 33"/ speedometer  (Read 7406 times)

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Offline w squared

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #15 on: March 29, 2011, 07:22:20 AM »
On a 3 inch lift, 33's will probably work just fine. 33's will do almost everything that 35's will...and are close enough to the stock 32(ish) inch tire size that you're not going to cause yourself too many problems. Even with the taller gears of the Sahara (at least when compared with the 4.10's in the Rubi) you're probably okay on 33's, and 33's will not cause as many unit bearing and ball joint issues as 35's do. 33's are also less likely to cause axle shaft and u joint and steering issues. Bigger tires put extra strain on all the components of your Jeep. The more you change your tire size, the more you need to spend on things other than tires to keep up.

By the way, I've seen a 4 door Sahara on 33's running an OME lift that was about 3 inches, and I think it looked pretty sharp. 33's should also fit without any real issues. I know that with my 35's and 3 inches of lift, I needed to make (and still need to make) a few "tweaks" to the rear wheel well area to get clearance.

You will probably need wheel spacers to get your wider tires to clear the suspension components, but as long as you buy good quality machined hub centric spacers and torque them properly you should be fine. Spidertrax makes good ones.

As far as tire type choice, I own a set of Duratracs - and I like them a lot. They're a great winter tire (I studded mine). I wouldn't run them in the summer as my primary off road tire, but I have different priorities than you, and I'm willing to run different tires for winter and summer. I do know a couple of guys that live in Alberta and run them year around, and like them a lot for that exact purpose. I'd guess that they'll give you 80% of the mud performance that a "true" MT would, 90% of the performance on rock and dirt, and will outperform a "true" MT in the winter. I think the Duratracs are a great choice for someone that will use their DD on the trail once every couple months.

As far as pressure goes, lower will almost always give you better offroad performance....but the lower you go, the higher your chance of a tire coming off the bead. Unless you're running tires made for a 1-ton (E Rated), 15 psi should be low enough  to start seeing performance improvements off road, and 12 should be even better. I'm like Simon...I run 9 psi...but that's just what works for me with my tire and rim combo. That doesn't mean it will work for you. I also carry the tools needed to put one of my tires back onto the rim if I do lose a bead. I wouldn't
 run at 9 psi if I didn't have those tools with me.

I followed a rainbow out to a garage and found a leprichaun. The rainbow ended in a potted cactus on his porch, but there was no gold :(

Offline specialk

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #16 on: March 29, 2011, 08:02:08 AM »
If you want a real M/T tire. If you want an AT that can handle some mud and does well in the snow, the Duratracs are a good buy.


Right Kev?.... ;D

Absolutely.  I'm running Duratracs now on the road and they are great.  Not eager to wheel them in the summer
04 TJ Rubi

Offline Anton

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #17 on: March 29, 2011, 11:25:37 AM »
Wow that is a lot of info, thanks guys that makesme fell beter and beter.
Now in regard the wheel spacers,  when I look at tire size what number tels me that it is not going to fit or need spacers? So Lt275/70/18 is to big with out spacers?
1996 jeep cherokee.

Offline w squared

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #18 on: March 29, 2011, 06:06:08 PM »
I'm not sure of the metric sizing and what it translates to...but anything wider than 10.5 inches will likely need wheel spacers.

Generally, the most popular size for 33's on Jeeps that are being off-roaded is 33X12.5...so unless you deliberately buy a "tall, skinny" 33, you're likely to want wheel spacers.
I followed a rainbow out to a garage and found a leprichaun. The rainbow ended in a potted cactus on his porch, but there was no gold :(

Offline Bone206

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #19 on: March 29, 2011, 08:01:46 PM »
I tried 275/70/18 Duratracs on my JKU before and after 1.5 spidertrax spacers. Before the spacers, the wheels will rub the air dam at full turn without flexing. No problems because the air dam can be removed or trimmed. The bigger problem is that it rubs the sway bar slightly, and there is more rubbing with some flex. It works flawlessly with the spidertrax (no rubbing) and if you are running the factory OEM sahara rims, I highly recommend them. The only downside (small downside relative to the benefits), is that your tires will stick out slightly relative to the fenders, and spray more road grime on your jeep.
07 JK Sahara Unlimited, 1.5 spidertrax spacers, 2.5 teraflex cl, 275/70/18 duratracs, ace rock rails, black OEM  rims, safari straps roof, Cobra 29 WXBT CB

Offline Anton

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #20 on: March 29, 2011, 08:52:40 PM »
Sweet, so 275/79/18 stuck rim with 1.5 spacers I am good then. Sweeeeet thanks guys. Now it will be only time until I will save the money. Will have to ride with the stock tires for some time.
1996 jeep cherokee.

Offline parabs

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #21 on: March 29, 2011, 09:58:11 PM »
So i looked around found this

Goodyear Wrangler MT/R with Kevlar and the Duratrac comes for my 18" rim: LT 275/70/R18 = 33.4" tire and LT 275/65/R18= 32.1 and 

1. LT 275/70/R18= 33.4" Tire
2. LT 275/65/R18= 32.1" Tire
3. LT 295/65/R18= 33.1" Tire

Canadian tire have the Territory tire with the sizes 1 and 2 stated above. Now witch size would work the best for me?

I bought the 295/65/18's for the Lincoln Mark LT I just bought.  The truck is heavier than a JK, but with 45psi in the tires they only measure 31.5" installed on the truck.  Advertised is usually at least an inch taller than actual, unless you are buying toyo (muds at least).
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Offline Anton

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #22 on: June 11, 2011, 09:25:41 PM »
So I got beter tires finaly thanks to Aaron. So I did the speedometer wih my super chip and the size that I need is 33". The chip gives me 33, 33.15 and then 33.25 and up. My tires are 275/70/18 and every were I look it shows that that size is 33.15. I did it on the chip (33") and thought it is good. Last night I was doing around 119 and a hond civic was passing me doing 115 ( love the digital speedometer). So do I just need to spend some time with the chip and drive around or there is a beter way to find out the true size of the dire?

Thanks Anton
1996 jeep cherokee.

Offline jkrubi

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Re: When to stop upgrading/ Dilema with Tires 33"
« Reply #23 on: June 11, 2011, 09:34:25 PM »
So I got beter tires finaly thanks to Aaron. So I did the speedometer wih my super chip and the size that I need is 33". The chip gives me 33, 33.15 and then 33.25 and up. My tires are 275/70/18 and every were I look it shows that that size is 33.15. I did it on the chip (33") and thought it is good. Last night I was doing around 119 and a hond civic was passing me doing 115 ( love the digital speedometer). So do I just need to spend some time with the chip and drive around or there is a beter way to find out the true size of the dire?

Thanks Anton

Set it to 33.15 not 33, and then use a gps for the actual ground speed and  see if it matches.

Offline Anton

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Re: Dilema with Tires 33"/ speedometer
« Reply #24 on: June 11, 2011, 10:34:31 PM »
Sorry I made a mistake. It jumps from 33 to 33.25" nothing in betwen. That is stupid.
1996 jeep cherokee.

Offline jkrubi

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Re: Dilema with Tires 33"/ speedometer
« Reply #25 on: June 12, 2011, 07:57:17 AM »
Cause you fall in-between sizes you'll have to live with a incorrect speedo, just choose what ever one fits the closest to the speed you are doing. Use a gps for speed it will be more accurate then the Honda besides of you.

Offline Anton

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Re: Dilema with Tires 33"/ speedometer
« Reply #26 on: June 12, 2011, 10:37:22 AM »
Lol thanks, did not even think a bout the gps.  ::)
1996 jeep cherokee.

Offline w squared

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Re: Dilema with Tires 33"/ speedometer
« Reply #27 on: June 12, 2011, 10:46:44 AM »
If you need one to verify the speed, you can borrow mine.
I followed a rainbow out to a garage and found a leprichaun. The rainbow ended in a potted cactus on his porch, but there was no gold :(

Offline Anton

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Re: Dilema with Tires 33"/ speedometer
« Reply #28 on: June 14, 2011, 09:00:48 AM »
So I checked the speed with the gps and when placed the cruse control it looked that I was off by 2 k/ h or it would show same speed. So I think I am good here. And thanks for the offer for the gps.
1996 jeep cherokee.

Offline silverfox

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Re: Dilema with Tires 33"/ speedometer
« Reply #29 on: June 14, 2011, 09:25:23 AM »
So I checked the speed with the gps and when placed the cruse control it looked that I was off by 2 k/ h or it would show same speed. So I think I am good here. And thanks for the offer for the gps.

Was that a third party GPS or do you have the one that is built in to the JK (from factory) I don't recall from when you were in my garage.

If it is factory they both run off the JK's computer (your speedo is digital) and no matter what tires you run the GPS and speedo will read the same (go ahead ask me how I know this  >:()

If it is a handheld or aftermarket then you are good
2018 JLU Lifted on 37's