Why is that the tandem spacing is much more than a single bike. I know that the dish is less and that it is stronger, but is it that much stronger? Is there any other reason except for the strength of the wheel? Does a hub made for a 145 spacing have the spokes further apart [left and right] or is it just a longer axle. I know that there may be several hubs but I was wondering what the 'norm' is.
I tried searching but was not able to find what I was looking for.