HamishD wrote:All three . . .
Courier bag more comfortable on the roadie than a (decently ventilated on the back) rucksack, especially when on the drops, but you can carry more in the latter.
Rack/panniers for when you’ve got lots to carry and don’t mind the bike handling like an absolute dog.
Now, is it REALLY more comfortable? I've been told this by some people, but I can't find any courier bag that even remotely supports these claims.
As for 'handling like a dog', I disagree, sure it's a shade heavier, but it only handles like a dog when you've got one side full of wine, and the other full of feathers, or similar.
Sounds like an interesting night in...
Handles like a dog is an exaggeration, but a loaded rack does make a difference to the feel of a bike, especially if it's a lightweight that wasn't designed for one. The extra weight only slows it down a bit but it makes it feel
slower, cos it doesn't get-up-and-go when you jump on the pedals. It also makes it less agile, so quick changes of direction are harder and trickier to float over potholes, tram tracks etc.
I always seem to get more snake-bite punctures with the weight on the bike, 'cos I can't unweight the back wheel as neatly... It's more comfortable, of course, but also less convenient (for my particular circumstances).