Careful when going to taller rims. Check and double check tire clearance when suspension is compressed. You may have to go to a shorter sidewall tire. Many tire shops will not mount a non Trailer rated tire on a trailer. Some will. Also, the brakes are designed using what is on your trailer. Heavier/taller tire and rim combination will increase the rotating mass. I know, there is a fudge factor engineered into it, but technically, your on the hook for liability if you change from what BC engineered and built.