stephenjubb said:
Most tourist bikes come with Cantilever Brakes, yet from what I've read V Brakes are much better despite their being fewer accessories (i.e. brake levers for drop bars) available.
My questions are on a tourer would you prefer V Brakes or Cantilevers on a tourer and secondly why do tourers mostly always have cantilever brakes?
It's historical I think. In the 80s, both the fork blades and seat stays on tourers were closer together, mainly because of narrower rims and tyres, plus smaller clusters on the rear. Cantilevers also stuck out more (I remember one reviewer of the time likening them to Prince Charles' ears!). This gave them plenty of leverage (the brakes, I mean, not his ears...).
Modern cantis are more vertical and stays/fork blades are further apart. As a result, cantis don't have the mechanical advantage they used to have. The ones that use shoes that take the same pads as V brakes are the worst IMHO (eg Avid Shortys) as there's no provision for moving the pad closer to the rim. This means the cantilever remains mainly vertical severely limiting the amount of leverage you can apply to the rim.
The older ones that used to have the stud fitting blocks -
like these - were good (still available cheaply by the way in almost every French hardware store!) because you could move them close to the rim, and the cantilever itself more horizontal as a result. This gives much more stopping force and makes them pretty good.
Whilst in France last year I stocked up on the old stud blocks. They worked a treat a 2€ a pair!
Cheers,