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Topic Review (Newest First)
04-02-2007 10:15 PM
mrbigjeep
Quote:
Originally Posted by 1BLKJP View Post
Ah, this is pure fooey. I've ran a 35" tire on my stock spare tire carrier for almost 3 years now. It hasn't broken or fallen off yet. Now can I tell that it's been on there? Yes. But do I think it'd mandatory for you to go out and blow 400 - 800 bucks on a new rear bumper/tire carrier right away? No.

SHHHHHHHH!!!!!!!! his wife might read this!

we ARE trying to score him a new rear bumper aren't we?
04-02-2007 02:34 PM
1BLKJP
Quote:
Originally Posted by bigjeep View Post
you mean is 4" of backspacing gonna be too much. you don't want too much backspacing or you'll rub when turning. 4" of BS will be fine. steelies look good and they are cheap but if you can afford the painted aluminum then go for those. simple scout and 1blkjp are both runnin the claws...they could give some input
I love my Baja Claws. I do nothing but rock crawling and I feel that they hook up way better than a BFG MT or a Goodyear MT/R. I rotate them both forwards and backwards to achieve a more efficient wear pattern on them. Also from the few times I've had to go thru mud they work exceptionally well there also.

Quote:
Originally Posted by bigjeep View Post
well i would definitely get the new rear bumper with carrier ...or else your tailgate will definitely crack and fall off from the extra weight of the spare tire....

as far as the "safeness" of the wheel, one isn't safer than the other unless you just said that meaning you would rather get 4" just to be sure you didn't have rubbing problems
Ah, this is pure fooey. I've ran a 35" tire on my stock spare tire carrier for almost 3 years now. It hasn't broken or fallen off yet. Now can I tell that it's been on there? Yes. But do I think it'd mandatory for you to go out and blow 400 - 800 bucks on a new rear bumper/tire carrier right away? No.


I also run 15x10" rims with 3.75" backspacing and my jeep probably has a bigger footprint than what you are wanting. Look at it this way. The stock 15x7.5" rims for a jeep have 5.5" backspacing on them. If you are going up to a 12.50" wide tire with a 15x8" rim then you are going to rub on the control arms. So if you were to push that tire out 1.5" with a 4" backspaced rim then you will not rub when you are turning.
04-02-2007 08:14 AM
Triple88a
Quote:
Originally Posted by RedRubiTJ View Post
Most wheel manufacturers have started to avoid this confusion in the past 10-20 years by giving measurements in offset instead
yep i never heard of back spacing untill i bought a jeep and then thats the only term i hear. For the offroad wheels they usually say bs before or after the #
04-02-2007 07:55 AM
mrbigjeep
Quote:
Originally Posted by Triple88a View Post
2" in rim width...i heard if you do much mudding dont get the 10.. but if you do a lots of rocks than 10s are good since more space for the tire to stay on before gettin clipped by the lip

both will fit 12.5s tires
actually the 10's are no better in the rocks. usually you air down a lot more in the rocks and with a wider wheel it will be a whole lot easier to lose the bead...not sayin that u will lose it but a lot of rockcrawlers get 8" wide wheels so they don't have to worry as much about losin the bead

if you get 10" wide wheels its gonna stick out a bit more
04-01-2007 11:31 PM
RedRubiTJ
Quote:
Originally Posted by ringram View Post
Wait.. got it sdrawkcab... 3.65 on 15x8 is equal to 4.65 on 15x10.
The confusion arises beacuse backspace is measured from the inboard wheel lip surface to the hub mounting surface. If you increase backspace on an 8" wheel by 1", your tire is resting 1" further inboard.

Remember though that the tire will center on the wheel. If you increase wheel width by 2" with the same backspacing your tire will move outboard by 1".

So the difference between backsapcing and wheel width is backspacing need to be 1/2 of the wheel width difference for the same tire position.

Most wheel manufacturers have started to avoid this confusion in the past 10-20 years by giving measurements in offset instead. Offset is the distance of the hub mounting surface form the centerline of the wheel. 0.375" offset on a 15x8" wheel will position the tire in the exact same location as 0.375" offset on a 15x10" wheel.

Jeepers are a little resistant to change which is why we still use backspacing mesurements.
04-01-2007 11:22 PM
RedRubiTJ
Quote:
Originally Posted by Triple88a View Post
backspacing is measured from the end of the rim not from the center so id have to disagree with redrubi
That is correct. What is important is where the tire is in relation to the mounting surface.

For example: 4" backspacing on a 15x8" wheel with a 12" wide tire. Half of 8" = 4" so the wheel is approximately centered on the hub which means the tire will be as well. 6" of a 12" tire inboard of the hub.

5" backspacing on a 15x10" wheel. Half of 10" is 5" so this wheel is approximately centered as well. 6" of a 12" tire inboard of the hub.

Does that make more sense?
04-01-2007 11:14 PM
Triple88a 2" in rim width...i heard if you do much mudding dont get the 10.. but if you do a lots of rocks than 10s are good since more space for the tire to stay on before gettin clipped by the lip

both will fit 12.5s tires
04-01-2007 11:08 PM
ringram So what are the big differences between 15x10 and 15x8?
04-01-2007 11:05 PM
Triple88a backspacing is measured from the end of the rim not from the center so id have to disagree with redrubi

04-01-2007 11:05 PM
ringram Wait.. got it sdrawkcab... 3.65 on 15x8 is equal to 4.65 on 15x10.
04-01-2007 11:02 PM
ringram So if I'm looking at Dick Cepek wheels, which I am, and they have two 15" wheels (one 15x10 and one 15x8) but both with 3.65" of backspacing, that means the 15x10 actually has 2.65"!?!?!?!? That can't be right.
04-01-2007 11:02 PM
Triple88a ^^^ ops he found me To me that looks like more of an excuse to get new tires as temporary goes the tire plug works well
04-01-2007 10:55 PM
RedRubiTJ Also just to note 4" bs on an 8" wide wheel is equvalent to 5" bs on a 10" wide wheel. About zero offset depending on wheel.
04-01-2007 10:55 PM
binaryking I run 33's on 15x10's with 3.6" backspacing with a 2.5 inch suspension lift and a 1 inch BL. No rubbing whatsoever at full flex.
04-01-2007 10:51 PM
ringram Here's something funny... I just went out to my jeep to get my bag and noticed that it was sittin funny. Upon further inspection i found a 1/2" bolt stickin out of my tire.... A sign from God to hurry up and get-ur-done?
04-01-2007 10:50 PM
Triple88a ringram you dont like the wheels sticking out deal? I love how off-road vehicles look with wide grip as said above wider fenders is also good. Anyhow keep us updated with what you think of.
04-01-2007 10:49 PM
RedRubiTJ Your backspacing needs are determined by tire size and lift but really more importantly tire and wheel width.

4" bs should fine with a 8" wide wheel up to about a 12.5-13.5" wide tire. If you go narrower you can run less bs. I currently run 15x8's with about 3.75" bs and 37x12.5's.

Steel is nice and cheap. Bends easily but can be bent back to shape a bit on the trail. Does not balance as well.

Cast Al is generally lighter and stronger. Does not often bend so much as breaks or cracks. Generally balances easier.

Forged Al is the strongest but most $$.

The lower the bs, the harder it is on wheel bearings as well.
04-01-2007 10:47 PM
mrbigjeep oh you'll be moving on to "fun" stuff alright you'll be getting into axles and regearing and lockers and all kind of stuff.
04-01-2007 10:46 PM
ringram Yeah, I was definitely referring to the rubbing. Man, I'll be glad when this lift and suspension stuff is all over. Tweeking your jeep the "right" way can be difficult, especially for a newbie. I didn't realize there were so many different people with so many different opinions about what works and what doesn't. I can't wait to get this behind me and get started on all the fun stuff.
04-01-2007 10:40 PM
Triple88a if you want black get the steelies.. cheap so you wont feel too bad when/if you hurt them. I agree with bigjeep.. the stock tailgate wont hold 33s for long unless you are really really lucky.
04-01-2007 10:26 PM
mrbigjeep well i would definitely get the new rear bumper with carrier ...or else your tailgate will definitely crack and fall off from the extra weight of the spare tire....

as far as the "safeness" of the wheel, one isn't safer than the other unless you just said that meaning you would rather get 4" just to be sure you didn't have rubbing problems
04-01-2007 10:23 PM
ringram Probably not that much of a difference, lookwise, between 4 and 4.5 anyways. It's be safer to just go with 4". Also, I told the wife that I "had to" buy a new rear bumper with spare tire mount because of the bigger tire size. I intended to lie.. but did I unknowingly tell the truth?
04-01-2007 10:15 PM
mrbigjeep i believe 4jeepn on here runs 4.5" of backspacing with no problems...wider flares is always an option
04-01-2007 10:11 PM
ringram I don't want them stickin out more than necessary. Could I get away with less bs bigjeep?
04-01-2007 10:05 PM
mrbigjeep you mean is 4" of backspacing gonna be too much. you don't want too much backspacing or you'll rub when turning. 4" of BS will be fine. steelies look good and they are cheap but if you can afford the painted aluminum then go for those. simple scout and 1blkjp are both runnin the claws...they could give some input
04-01-2007 09:13 PM
ringram
Almost there! Just need wheel advice.

I've been talking to you guys for about a month now. I stopped by the local 4x4 shop and talked to those guys. I also talked to some local jeepers. What I gathered was this... If I want to run 33's, I need 3-4" of lift. Opinions vary on the rubbing but bottom line is I'm not a rock-crawler (back-trails and beach only) so my chances of rubbing are extremely slim either way. I've read about 100 different reviews looking for a good deal, without sacrificing quality, and I've heard alot of good things about the 3" Black Diamond lift for around $590. Now I've got to decide on rims. Is 4" of backspacing going to be enough? I want black.. so shoul I get steelies or go with painted aluminum? Best brand? Best place to buy? Also going to get new tires. Anybody running Baja Claws? All advice, as always, is appreciated. Hopefully, there will be some before and after pics soon.

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