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had standard little road tyres on with no tread when i got it. got offered the tyres off a friend who had no use for them anymore. so they are just a temporary fix until i sort some decent ones out. What tyres would be best reccomended for the 15s?
The rolling circumference of a standard Jimny tyre 205/70 x 15 is 2040mm, your running 265/70 x 15 at 2297mm per rotation.
Every time the wheel turns, you travel 257mm further than a standard car, a difference of over 10%.
So your gearing needs to be reduced by 10% to get back to normal performance, but.... that won't be a "normal" load on the engine and performance will still suffer.
You need to make a compromise to best suit your needs, big tyres look cool but cost in many ways, loss of performance due to gearing, a huge increase in unsprung mass ( the weight of the axle and tyres) and a massive change in friction.
If you've got a road car that you play with at weekends, keep two sets of tyres and change them when you play.
I run 215/70 x 15 which is only 57mm bigger than standard, it still gives a noticeable difference in gearing and I use third gear much more than I did.
DanRigg94 wrote: still standard as far as i know, not too sure if the tyres are remoulded but i bought them a couple of weeks ago for £60 so couldnt refuse them. Any reccomendations on a different box or what i could do to mine?
Can you tell us the size please because I wouldn't necessarily blame them - Jimny can be a little underpowered compared to mainstream motors.
I'm in full agreement with sniper. 265 tires will definitely have a negative effect on engine performance! I'm running BFG KO2 AT 215/75/15's on my Jimny which, in my opinion, don't compromise too much on engine performance while still giving the car more girth and beefiness for that rugged off road look!
Just had a look at the link Daniel provided and some of my numbers disagree, they are taken from errolstyres.co.nz, a source I've used for years and I am confident in their info. having modelled gearing on it in the past, successfully.
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