Was talking to a local tyre shop this morning and I asked if they had any 235/75/15 tyres and they said don't put them on they will be way too big for the engine to try and pull. I was under the impression that this wasn't even that big a tyre with other guys running 31's and bigger. Does this size tyre affect everyday driving too much and also how much does it affect the low range gearing for climbing and slow driving etc?? He put them next to my 215/75/15's and they were around 2" taller.

Thanks

99 Kia Sportage, 50mm Lift, 30" Muddies, Manual Hubs, 2 1/4" Exhuast, Extractors, HiFlo Cat, K&N.