30x9.5R 15LT Tire size?

import600 · Post by **import600** » Tue May 12, 2009 1:41 pm

Does anyone know what that is in metric?

Better yet, what size tire should I use on a 15 inch wheel for a bump?

fordman · Post by **fordman** » Tue May 12, 2009 11:28 pm

factory tire size was G78 15

import600 · Post by **import600** » Wed May 13, 2009 12:08 am

what size is that!?? I'm used to seeing 195/45/15.

fordman · Post by **fordman** » Wed May 13, 2009 1:59 pm

the factory size i was told comes out to a 235 75 15. soem guys say you canalso use 225 75 15 to get the same look as factory.

nanuk · Post by **nanuk** » Thu Jun 18, 2009 5:52 am

I made up a spreadsheet to calculate that stuff for quick reference... some sizes are not available, but it gives a good cross reference for tire heights. in metric, the width matters to height.. In SAE it is just an additional number.

30" tire height would come out as 255/75R15. Now is that an available size? dunno... but that "Would" be a 30.06" tire. a 235/75R15 is 28.88" high. to get the width in inches. just divide the first number by 25.4.

nanuk · Post by **nanuk** » Thu Jun 18, 2009 5:57 am

oh... just to answer the question differently. 30x9.5r15LT works out to 235/80R15. I've not seen that size around here

mrtleavitt · Post by **mrtleavitt** » Thu Jun 18, 2009 8:48 am

I run 31x10.5x15 and those are the tallest tires you can run without rubbing on the radius arms at stock height. It looks good and gets you truck up off the ground if that's what you like.

AK F100 · Post by **AK F100** » Thu Jun 18, 2009 10:18 am

Most floatation sizes run about 1/2" short, so a 30" tire is usually only about 29-1/2" tall.

I would go with either:
255/70R15 (29x10R15) or 265/70R15 (29.50x10.5R15)
Both of those sizes should be available at any tire shop, they are very common and would look good on a truck.

Hope that helps, Rich

mwildcat2003 · Post by **mwildcat2003** » Mon Jul 20, 2009 10:32 am

Thats a great looking piece of machinery.

Awesome!

jfmaz · Post by **jfmaz** » Tue Jul 21, 2009 9:25 am

Here is a great link to tire sizes. Has all the information you could possibly want. I've used it numerous times to decide what tire sizes I want to change to. Click on this: tire size calculator

Salty · Post by **Salty** » Mon Aug 24, 2009 4:10 pm

Just wanted to add a couple things to this thread:

1) Stock size is G78-15, the modern equiv is 215/75-15 (27.7" tall) according to tire rack, 235's (28.9" tall) would be L78. http://www.tirerack.com/tires/tiretech/ ... chart.html

3) Here's my truck with 30x9.5's just to give you an idea of how it sits with stock suspension and wheels.

cdeal28078 · Post by **cdeal28078** » Thu Sep 24, 2009 5:04 pm

I went to a 31-10.50-15 also on my 71 F100. I like the looks and the ride is even better. Taller tire smooths out the bumps better
clint

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30x9.5R 15LT Tire size?

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