The lever limitations of road discs are the buzz kill; no hydraulic options, mechanical options with the V-brake cable pull ratio. The Avid BB-5 road is a solution to road brake lever pull, giving Trek the capability to put discs on their STI bikes. A close look at the BB-5 caliper shows how the unit was adapted to be operated by road levers by shortening the actuating bell crank at the far end of the cable. That resolves the cable movement issues but at an exchange of the force necessary for any stopping task. It also limits the range of motion of that little crank arm before the mechanical advantage is lost and you have to make an adjustment.
For my all-weather commuter I chose the rarer road levers with V-pull ratio and Avid BB-7s. I haven't had the opportunity to experiment with all kinds of disc brakes but I can say the scariest bike experience I have had in decades was a two mile descent of a two lane road in an absolute downpour that rendered my rim brakes nearly useless at the end of Bike Pittsburgh last month. I wouldn't have set out on the 65mile ride on my Rambouillet had it been coming down like that first thing in the morning, it just ended up that way and made me imagine that descent on my commuter once I was off the Mount Washington. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To view this discussion on the web visit https://groups.google.com/d/msg/rbw-owners-bunch/-/VLEsGwk9LMQJ. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
