So, i did a little test this summer about fuel consumption.
Now for a start my jimny is equiped with a FrontRunner roof rack with wind deflector mounted.
It has the BF Goodrich All-Terrain T/A KO2 235/75R15 on the oem aluminium rims.
I started the test with the tire preasure 1,8bar which gave the average result of 9,9L per 100km.
I then did the same test with the same distance over a month at the tire preasure 2,5bar which gave the average result of 8,8L per 100km.
The difference is insane - conclusion keep your tires inflated when driving on the road...
/Greetings from a happy camper up North!