Everybody uses that argument, but which is more likely to give you problems to begin with? A 16 ply, load H, 17.5" that's not loaded near its capacity or a 10 ply, load E, 16" that's being worked a bit harder? Besides, who doesn't carry a spare or two? I guess all four could blow out and you'd be up shit creek, but what if bullfrogs had wings? The Sailun S637 in a 235/85r16 and the Double Coin 215/75r17.5 are also a wash when it comes to price. If you look at both sizes in a Sailun, you can actually get the 17.5 for 8 bucks cheaper per tire. So there's that. My other reason for doing the upgrade was to get the 8k axles. I don't know if there's any big differences between them and 7k, other than having slightly larger brakes and 5/8" studs vs 9/16". Since mine usually has an 11.5k mini ex on it, I felt it was a necessity. Of course, this is all subject to whatever Jody wants to spend or deems necessary. I likely wouldn't have bothered with the 17.5s, but my junk is heavy Almost forgot, I have the spring assist on my ramps and they're quite nice. I would definitely hate them without it.