You're missing the point. Let me break it down...

- Majority of all 37" tires are 13.5" wide (forget the diameter... agreed, irrelevant... lets focus on width)
- These tires (13.5") are being run with 4.25" BS
- A 14.5 requires 1/2" more BS
- Therefore, if a 13.5" can be run with 4.25"BS then a 14.5" can be run with 3.75"BS (just as 12.5's are being run with 4.75"BS)



I'm not sure what was so tough to understand? I clearly spelled that out in my original post, yet you insist to always miss the point and go off on your rant. This is not the first time you've interjected while missing the point and in the end provide the same answer. Please read before ranting...

I guess I'll have to continue to make idiot proof responses just in case you continue to read my posts.

 

IS this directed towards me? This is my first post on project jk and if there is any miscommunication, I have found your feedback useful and will be trying it out. Thanks,
Brian

 

No it was for TEEJ....


Sorry TEEJ... I'm a bit grumpy/venting... work on Wall St. and I just found out my bonus #'s. Put a big damper on my pending Rubicon purchase!

 

The funny part is we both said to use 3.75" BS.



I think it was more about what "Normal" sized was...I'm thinking more people are running 12.5" tires, you're saying most people are running 13.5" tires.

I didn't even see any 37 x 13.5 KM2's, just 37 x 12.5's...so it seemed that we were really best using the 14.5" section width as a reference point.

I subtracted 1.0" from what the 12.5'ers ran, you subtracted 0.5" from the 13.5"-ers....and, as I said, your math was correct...

...we just considered different section widths to be normal.




Bummer on the Rubi Purchase/Bogus Bonus.

I too would have sprung for the Rubicon had the forces that Bean been kinder.

 

so...I Think I am stuck between a rock and a hard place...I have looked ALL over and cannot find a set of wheels with 3.75" backspacing or less except for the poison spyder wheels that are 3.5...Can anybody direct me to a company that sells a wheel that will work? would 4.25" rub if it is a 17x9 wheel??? Thanks,
Brian

 

You could go with a wheel that has 5-5.25" BS and add a Terraflex or Spidertrax spacer... (1.25 or 1.5" respectively)

 

Thanks...Hmm....I also think I need at least a 17x10 in rim...Is there any difference between running a wheel with that much back spacing, or getting a higher backspacing a wheel spacers? Is there more of a chance for the spacers to cause problems with such large tires?

Brian

 

My $.02.....I wouldn't run spacers with that large of a tire. I'm sure there are many that do with no problems, but it's just that much more of a chance that something can happen. I wouldn't have a problem running them with my 35's, after all, I have the PSC Beadlocks and have a lot of bolts to keep tight anyway, but doubling the studs and nuts with the added weifght of 38" tires seems like a lot of strain for spacers, to me anyway. Check out this chart for help. It show what offset you would need to acheive a certain backspaing as it pertains to wheel width.

 

I'm pretty sure the Pintler wide stance rim is supposed to be ~ 3.75" BS'd.

http://www.northridge4x4.com/proddet...AEV-20402020AA

Northridge says the regular Pintler has 4.7" BS, and the wide stance has one less inch BS/sticks out another inch, giving about 3.7" BS.



Of course, if the above chart is right (Looks OK from here actually...) then Northridge has made a mistake on its offset to BS calculation on their site.

Northridge claims 10 mm and 15 mm offsets in opposite directions, giving a difference of an inch in BS, but, for an 8.5" rim, zero offset is 4.5" (Half of 9")....so the DIFFERENCE sounds right, but the actual BS sounds off....maybe they forgot to use the full rim width to calculate the BS?

 

Unfortunately, I think I have to run 17x10's with a 14.5" with tire, correct? If I could run 17x9's that would make things quite a bit easier...I called hutchenson and BFG and they say you shouldn't run the 14.5 on a wheel smaller than 10" width...I don't know..I would like to get the tires to work, but maybe I should try and return them, I have called, American racing, hutchenson, Weld, and eagle alloy and no one carries a 17x10 with a 5x5 pattern anymore, let alone in the backspacing I would need...any suggestions on wheels would be greatly appreciated. Thanks,
Brian