I'm told that when touring (carrying a big load) you're much better off to have 26" wheels than 28". But most second-hand bikes seem to come with 28".
Is it possible to replace the larger 28" wheels with smaller 26" ones?
What sorts of issues would I run into?
- pedals hitting the ground?
- v brakes not being able to reach tires?
- gear/derailleur issues?