2012 XP 900 rear tire/wheel help

A friend of mine and I are considering running the same size front wheels and tires (Stock rims and stock Bighorns) on the rear of our machines. The question we have is if we buy a new set of stock front rims and tires, can we just bolt them on and retain the same machine width front and rear or will we need to buy new rims with an offset for the ones we plan to use on the rear to retain the same width front and rear?

Thanks

Chris