Not knowing the exact year of your bike, I believe it came with 32’s.
Regardless, can go to whatever tire width that will fit in the frame on those 13mm rims. Technically Alex AT450 has a 622x14 spec, but it is academic. Unless you are bombing hills and making ultra high speed turns, the tires aren’t going anywhere. Even more so if you use a tubeless compatible tire. Don’t spend money on another wheelset.
Good rim tape, larger flat resistant tires, an LBS can help, and maybe a tire liner as a last resort and you should be fine.
John