Blades, heavy duty, thicker than stock, ok on spindles?

So, I've come to the notion that there really aren't that many blades out there. My toro walk behind 36" came with extra blades and I was trying to discover how universal they really are. My conclusion is that if, the center hole diameter and the blade legnth match the stock specs, it will fit.

That being said, is there any issues with running heavier blades? for example, the stock blades on my toro turbo force 36" walk behind are much skinnier and lighter. The replacement gator blades...

Blades, heavy duty, thicker than stock, ok on spindles?