> > I have LX V-brakes on a cyclocross frame. The problem I'm having is that
> > there doesn't seem to be enough tension in the brake cables becuase the
> > brakes don't spring back enough when I realise the brakes levers.
> > I'm using one of those roller-converters because I'm using road brake
> > levers so there's probably some added friction there.
> > And the brakes are set in the boss holes that would give it the greatest
> > tension.
> > I've lubed them and checked the adjustment too and even bent the LX
> > spring arms back for added tension.
> > But it's still not enough.
> > Any suggestions/comments???
> What I did with the same setup was turn the centering screws (both arms
> have one, its on the outside near the bottom) until they were almost all
> the way in, then backed off *slightly* to center. I have noticed that
> they aren't as snappy as the V-lever/brake setup on my trail bike, but
> they are close. And put the springs back in the center boss holes.
> According to the latest Velonews, Jagwire is coming out with a cable
> that is *much* more flexible than usual. VN comments that they'd be
> ideal in V-brake applications.
In V-brakes, the brake leverage in the caliper arms rather than the
levers, which means a smaller cable tension results in higher force at
the pads. The flip-side is that the return springs on the caliper arms
pull with a lower force on the cable when the brakes retract, which may
be what is causing the problem.
QPB, makers of the Travel Agent roller cable-travel converter, seems to
recognize the potential cable return problem, because they have recently
begun including a more flexible high-strand-count cable with each one
(similar the Jag Wire). By the way, QBP also sells both plain and
teflon coated high-strand cables separately, as well.