Originally Posted by Davidg
I used a local mom & pop tire shop. Since air is 80% nitrogen, I think it's a hoax. 80 psi. No, I just bought 4, although I considered 5. I figure since the original spare is not old and hasn't been on the road yet, it will serve as a spare for a year or so. You are doing the best first step by becoming informed. Good luck, and let us know what you decide.
Where does your spare mount? If not under the RV but on back bumper it is imperative that you have a light color (white preferred) cover for the tire. I have seen tires have belt/tread separations with zero miles use.
I understand the technical reasons which aren't important now other than to say the failure can be delayed or prevented with proper steps.
I write a blog on RV tire application and safety. RVTireSafety.com
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV