Inner-rim width and affect on handling

[eurotrash666]

2 mm makes a surprising amount of difference, and I don't think "they wouldn't make them if they were useless" is a good argument in an industry that brought you these:

I fully agree, and I currently own and ride 8 wheelsets to back that up.

Some tires seem to bottom out/pinch less on the 21mm rims than the wider ones

I fully disagree. I have pics somewhere of me landing 6 feet to flat with complete bottom out with 2.4 tires on Crossmax ST rims. It is a sorry sight to see how those tires behaved in time-series. Not to mention the unbelievably sh!tty cornering performance.