Quote:
Originally Posted by bandit86
Slightly off topic but not, 1995 land river discovery needs tires. Stock size is 225 75 16. Would like to go up to a 245 size, something more aggressive. Any suggestions? I had 235 85 16 on my last one and my fe dropped to half but worked great off road
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First off, you need to be aware that your vehickle originally came with P type tires - and it appears you are using LT type tire on it.
The difference between these 2 tires is that LT are designed to carry much more load than P type tires - and that means the materials used have to be more robust. I call this higher "unit loading". What comes along with this is the materials generate more rolling resistance.
Plus, LT type tires do not like flexing as much, so you need to use 15 psi more pressure to get the same load carrying capacity (for the same dimensions)
This thread has discussed the "Larger is better for RR" principal, so going from an LT225/75R16 to an LT245/75R16 would be directionally better - but as has been said before, the effect is small.
If you are using the vehicle off road, then I think you need to ignore that fuel economy aspects and chose tires basded on their off road performance - and that means you're in the wrong place to be asking such a question.