Kayteg1 wrote:
Lot of bigger RV are using 22.5 tires that semitruck use. No need to carry those as each tire shop have plenty. Than if you have smaller, harder to find size, why not have whole wheel? Steel rims are pretty cheap and even aluminium rims can be found cheaply.
Than just like each insurance, it should be evaluated. Do you really need it? I have been changing 180lb wheels few years ago and I hope I can still do it when I age. If not me -any tow truck driver will help me to install spare on my RV and local tow truck is covered for no extra fee by my AAA vehicle insurance.
Lastly paying $300 every year for the insurance to save $500 on service once in decade???? Take a piece of paper and calculate.
Call a few truck tire shops, see how long they would need to get your size. The answer may amaze you. Many A's use oddball sizes, very few use the industry-standard 11R22.5 size. A 295/75R22.5 is a direect replacement for Michelin's weird 275/80, but the smaller 22.5s are real oddballs. You can probably get a 255/70, but it's probably a brand you've never heard of (Aeolus, LEAO, or Gladiator, anyone?) and might be a trailer tire.