Lift height "reads" horizontal; tire diameter "reads" vertical. This chart shows approximately what lift height is required to clear a certain diameter tire. It is not 100% accurate because of the many varying factors such as: actual tire height (brands differ), wheel width / back spacing, and your particular clearance needs due to driving habits. The chart was prepared with standard width tires in mind. Clearance is reduced when extra wide tires / wheels are used. We suggest that you speak to someone that is intimately familiar with your specific lift / tire / wheel combination prior to purchasing new tires / wheels. Ideally, verify fit and clearance before making the purchase; most full-service dealers will allow this. Carefully check for proper fit / clearance throughout the vehicle's entire suspension travel and steering turning cycles. In addition to tire-to-fender clearance, alsp check fot interference on the tire / wheel's inboard side (knuckle, brake caliper, steering linkage, inner fender, etc.).