2013 high RPM's???
Thread Starter
JK Enthusiast
Joined: Nov 2012
Posts: 175
Likes: 1
From: San Antonio, TX
You said you have 255 tires with 16" steel wheels. As far as I know they don't have stock tires in this size. You probably meant to say 225 tire? If so, then you need to take that into account, as it's more of a 28" tire, not 31". With a 28" tire your RPMs at your speeds according to rpm calculations should be:
@65mph: 2415 rpm
@70mph: 2601 rpm
With a 31" tire it should be:
@65mph: 2181 rpm
@70mph: 2349 rpm
@65mph: 2415 rpm
@70mph: 2601 rpm
With a 31" tire it should be:
@65mph: 2181 rpm
@70mph: 2349 rpm
JK Freak
Joined: Mar 2011
Posts: 791
Likes: 0
From: Vancouver, BC
@65mph: 2113 rpm
@70mph: 2275 rpm
If you do happen to get a tire that is 33" mounted (this tire is likely going to be advertised as a 34"), it will be:
@65mph: 2049 rpm
@70mph: 2207 rpm
JK Super Freak
Joined: Jul 2011
Posts: 1,086
Likes: 6
From: Orange County, NY
Jpop's chart - good info
Check this out, it has all the answers and it's accurate...
http://farm8.staticflickr.com/7159/6...9b861446_b.jpg
http://farm8.staticflickr.com/7159/6...9b861446_b.jpg
JK Enthusiast
Joined: Oct 2012
Posts: 120
Likes: 0
From: Wilmington,Delaware
I have a 2013 JKU Sport with 3:73 gears,auto and 255/75/17 tire package I recently went on a 500 trip and averaged 21.2 mpg @70mph at around 23-2400 rpm.If I went up to 75mph
it went down to 17 mpg.I ran 36 psi. in the tires which increased to 38 as the tire heated up.
it went down to 17 mpg.I ran 36 psi. in the tires which increased to 38 as the tire heated up.
