Interested putting on 35 12.5 R18 on my Jeep, for off-roading what size of offset rims to have clearance…note I have a 2 inch lift installed

This is not something we can help with - we only recommend original equipment tire and wheel sizes for vehicles, as your safety may be compromised, as well as the longevity of the vehicle without mechanical failure. See a local shop near you for guidance.