Helping my dad, Kia Sportage off road tyre

Morning. After seeing my General grabbers on my jimny my dad now fancies a set for his Kia Sportage but I'm struggling to find a close size.
He has the sportage Titan with 255/55/17 road tyres fitted. Does anyone have any experience with the Kia? Or could help with tyre size alternatives?
I did find a site that had a ratio calculator on it but it didn't help with what would fit.

And this forum should give itself a pat on the back, any of the Kia forums I searched on for tyres seemed very........quiet. On here seems much much much more active

(big thumbs up to everyone)

If it's still under warranty don't. Had one at work a few month back and it had mud tyres and had a diff problem Kia wouldnt pay because the fault could have been caused by the tyres

But could put 235/65/17 on it be an inch bigger tyres overall

Cheers I'll have a look. It's out of warranty (it's an '07) i always thought the tyres were too small and looked out of proportion to the car, it does need a chunkier tyre on it. I'll need to see how accurate the speedo is before I suggest anything bigger I suppose as I don't want the blame if he gets a ticket. Lol.

NineCherries wrote: He has the sportage Titan with 255/55/17 road tyres fitted.

That is a fairly large size anyway isn't it?

Did you use this
www.4x4tyres.co.uk/4x4_tyre_size_tool.php

I just searched on this page www.tacomaworld.com/tirecalc and it tells you the speed change there too