Brucey wrote:has anyone run sums on the geometry? I confess I have not, through sloth....
Just wondering if the brakes compare well with cantis both in theory and practice.
I had a halfhearted go at this a while ago - trying to work out my options with running V's with STI's. The V MA's easy to work out 'cos the arms are a simple lever with the arm length and pad height determining it. It also doesn't vary with arm angle/yoke height. To compare it with a canti set up you need to have the precise details of the specific canti installation.
The more interesting bit is the amount of pad movement you get for the cable pull (the reason for having mini-V's) - this depends very much on the height of the pads above the bosses. The higher they are then the more pad movement you get, but the less mudguard clearance you get. I had mini-V's with 85mm arms with the pads at 30mm above the bosses, this gave a reasonable MA, a reasonable amount of pad movement (much better than full V's but not anywhere as good as V brakes with V levers) and a decent clearance for MG's over a 32mm tyre. This gave very acceptable braking performance with good pads, IMHO better than cantis.
What made me change back to full V's and Cane Creek (Tekro) Drop V brake levers was the lack of a quick release with STI's. There still isn't enough pad movement to leave enough clearance to undo the noodle unless you back the adjusters right off when you fix the cable - and this leaves you with little adjustment to take up pad wear unless you re-clamp the cable