Okay I'm kind of confused now.
When they compare wider tyres to thinner tyres, is this when they put these tyres onto a wheel that's the same width? For example, they put some 205 tyres onto a 6.5" wheel, you get more of front to back grip, but if you put 225 tyres onto the 6.5" wheel you'll get more of a side to side. Is that what they're trying to say?
But lets say if you put these 225 tyres onto a wider rim, like a 7" or even 7.7", would this be more grip than the other because the shaped of the tyre on the ground won't be a rounded shape?
I hope some can understand what I'm trying to say and can explain it better.