I got some 18-8.50x8 V-61’s a couple years back from MILLER for my 140. I wanted to put them on my stock rims, to go with the 26-12-12 Tru-Powers on the stock rims on the back. I talked with Miller wondering about putting the 18-8.50’s on the smaller rims, and they were quite helpful with that. I’ve never had any problems with them, and I just got another set for my 400 a month or two ago. They are working good, too, but I don’t mind them being rounded, and I didn’t notice the graying, but I use the 400 nearly every day or every other day mowing different yards, so they’re usually dusty anyway.
I have one other set of 16-6.50x8’s that are mounted, but not seated, to go on my Patio 140, that I got from a fellow member. They’re several years old, but I didn’t notice the graying on them, either.
I can’t speak for everyone, and there’s going to be bad experiences, but as for my experiences with Miller and V-61’s, I am happy with them. I do agree that the prices are quite high, as it doesn’t really seem right that some car tires are cheaper than these little lawn mower tires, but, I am glad they’re available, because I like the way they look, and steer on my tractors.
That’s just my two cents, even though it’s probably only worth one cent!!