I didn't say I couldn't tour on 28'' wheels. They are actually totally awesome. I'm just worried about not being able to mount tougher tyres (wider, buffier). The hub brakes I have checked have in-hub gears, so I would need to dump the whole shimano business, no? I didn't say I was going to get new 26''... more like second hand. But as my first sentence suggest, I would like to see if it's reasonable to switch brakes (the main issue), and since the studs ain't the same size, it probably ain't reasonable.