Astandard Vit 90> will take 215/75 15, but they can just rub a tiny bit on the chassis rail on full lock.
Contact Sowden tyres ( Google him) he has a comprehensive list telling you what will fit what and what mods to fit bigger, he is very good for tyres too.
One word of caution once you go bigger than 215/ 75 you really start to mess up the gearing why go bigger?