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Hang on... wouldn't that double the tension or force able to be applied to the cable, but halve the cable pull? i.e. making the lever somewhat useless with V-Brakes?
smac-
No, the opposite, it pulls twice the cable with half the force. Where before there was one length of cable being pulled out by the lever there are now two, so the net result is double cable pull. Hope you can make sense of my crap diagram... If we call the distance to the pulley at rest x, each stretch of cable increases from x to x + d so net increase of 2d. It definitely seems to pull twice the cable using the old Eyeball Gauge
It's a non-destructive modification, sort of, in that if it doesn't work it can still be used as a normal road pull lever.
frankenbike
Theoretically modified a brake lever to pull V-brakes. Cable pull on road levers is approximately half that on V-brakes so you need to double the cable pull. Drilled a hole from the back, looped the cable over the normal head retainer, feed it back through the normal cable exit and now it pulls twice the cable.
Haven't tested it on a bike yet, will maybe try it on Sunday.
If I were more invested in the project I would file a nice gulley/slot/thing in the cable head retainer thing so that the cable has a nice smooth run, more like a pulley. Also with a longer drill bit I could clean up the routing from the back a lot.
Should be doable with any similar road pull lever as long as there's somewhere appropriate to retain the cable head. But please don't drill out your expensive Dura Ace shifter and then come to me if it breaks
You can see the cable head wedged in next to the clamp for the bars
Would be nice for a CX-type bike or tourer to run full V brakes with brifters, though I feel the cable is going to get trashed pretty quick in this bodgy setup