Trying out the new tires on Indian Cyn [Archive] - JKowners.com : Jeep Wrangler JK Forum

: Trying out the new tires on Indian Cyn


so_calif_rubi
09-14-2008, 05:09 PM
Checking out the Rubi's new tires on Indian Canyon Saturday:

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7728.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7729.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7730.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7731.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7732.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7733.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7734.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7735.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7738.jpg

http://i167.photobucket.com/albums/u159/Calif_Princess/100_7739.jpg

afoulk
09-16-2008, 03:38 PM
How are the new tires workin for ya? they look like they fill the wheel wells out a little better than the old ones:)

100dollarman
09-16-2008, 04:54 PM
Looks really good! I like those rims!

so_calif_rubi
09-16-2008, 06:25 PM
How are the new tires workin for ya? they look like they fill the wheel wells out a little better than the old ones:)

It drove like a super, big pile of CRAP when we put in the manufacture recommended 50psi, however due to my endless, pantywaist-whining Richard took some air out and we're now running them at 30psi and they drive very, very nice now!!! I'm happy and not whining anymore....so now I won't end up in a ditch on my way down the mountain :grinpimp:

so_calif_rubi
09-16-2008, 06:30 PM
Looks really good! I like those rims!

I finally got some shiny!!! :grinpimp:

TEEJ
11-14-2008, 07:12 AM
It drove like a super, big pile of CRAP when we put in the manufacture recommended 50psi, however due to my endless, pantywaist-whining Richard took some air out and we're now running them at 30psi and they drive very, very nice now!!! I'm happy and not whining anymore....so now I won't end up in a ditch on my way down the mountain :grinpimp:


LOL

The MANUFACTURER DOESN'T RECOMMEND 50 PSI.

:D

That's the MAXIMUM rated pressure, NOT the "recommended" pressure.

The tire maker just has no way of knowing what truck the tire may end up on...a suzuki samuri or a super duty, etc....all take DIFFERENT PSI.

Take the LOAD RATING that goes with that MAX psi on the sidewall...that's what 50 psi can support safely.

Now, take the total loaded weight of YOUR rig, divide by 4 if evenly distributed....that's roughly the psi you NEED to support as you tool along.

Typically add ~ 35% - 40% to that weight, to account for braking and handling load transfer, personal preferences in control vs softness, etc....and, compare THAT weight to your sidewall MAX rating.

That Weight/MAX Load = correct psi/MAX psi

So, if -

the tire is rated to support ~ 3,195 lb at 50 psi (A typical load range)

Your JK has a GVWR of ~ 5,500 lb

That means ~ 1,375 lb per corner, + 35% - 40% = ~ 1,788 lb to 1,925 lb load target

50 psi/3,195 lb = NEW PSI/1,925 lb

New PSI = ~ 28 psi to 30 psi range. (What you found by experimentation)

:D

That's not infallible, as tire loading is not perfectly linear, but, it typically gets you into the ball park quickly.

jacktuttle
11-14-2008, 10:57 AM
Those look really good. Does it rub anywhere? This is still on the 2.5" Lift?

so_calif_rubi
11-14-2008, 08:55 PM
no rubbing,and yes still 2.5' bb still in

so_calif_rubi
11-14-2008, 08:57 PM
ty Teej.good info

homesickmarine
11-21-2008, 03:47 PM
TEEJ, did you engineer wheels and tires in another life? You know more about rims and tires than all of the 15+tire sales people I have talked to in the last two months combined! :beer::beer:

TEEJ
11-21-2008, 08:05 PM
TEEJ, did you engineer wheels and tires in another life? You know more about rims and tires than all of the 15+tire sales people I have talked to in the last two months combined! :beer::beer:

Thanks!

:D

It was this life though.