Many thanks for the feedback so far. The current screws have a Phillips head--that is what is actually getting stripped, not the wheel itself. I will head for Home Depot or Lowe's and see if I can find some replacement screws and lock-nut washers, thanks to laytonl for the size. The Hubba covers are a bit pricey and crawling under the wheel-well monthly does allow me to check things. And, N803RM, those Michelin air stop tubes must leak some air! I can't believe they don't. How often do you check tire pressures? I have owned my J for 5 years and have learned that if the main tires get close to 20psi instead of the normal 30psi, the airplane becomes a potential "bounce house" and risks a prop strike unless a "grease job" landing is done. My nose tire loses at least 10 lbs psi or more below the recommended 49 psi, between inflations. I figured one of the secrets of respectable Mooney landings was not only approach speeds but also proper tire inflation. Do other owners find tire pressure quite important as a factor in smooth landings?