My husband was recently diagnosed with Lewy Body Dementia. It is early stages of the disease which means we should be able to travel for quite some time. So,,,,here is where I need help. We need to replace the tires on our 2014 Keystone Passport 23rb TT. I want to be sure we are purchasing tires that are going to last us longer than the ones we have now. Safety is a great concern. Thanks so much for your help. No doubt I will be back for more help.