A place for more technical discussions. Please make sure you post in the correct section on the site, this way it keeps the site tidy AND ensures you get a more relevant answer.
If you've never driven a standard Jimny it may be difficult to appreciate how sluggish they can feel but having to change down a gear or two on hills is quite normal! Work the engine a bit harder and the performance is adequate. Remember peak power is at around 6,000rpm, and you may need to use all of that power to get up a hill at 70mph!
I have the same tyres in the same size on mine. There is a noticeable difference in performance between them and the standard tyres which is to be expected. Not only is the gearing stretched by 6%, but so is the speedometer so you have to drive 6% faster to reach the same indicated speed. These 2 factors also contribute to an apparent poor fuel economy (expect it to work out to between 25-30mpg), when in actual fact it doesn't change too much.
So yeah, sounds about right to me.
