Avid BB7 IMO. The adjustable inboard and outboard pads make it easier to adjust, as most don't have the ability to adjust both. When setup right they've got great power and I've run 'em with very bent rotors before with pretty good results.
The thing is that all mechs will pretty much have the same pad to other pad distance, and that's where rotors rub. If that distance is different the lever will have more or less slack in it because all V-brake levers pull the same amount of cable.
I just put a bb7 on my dj bike last week. Once the pads got bedded in they work well. Still not the power of a hydro but good enough. I got sick of having to bleed my front brake (goes through the steerer) everytime I needed to do something to my stem/fork etc.
Ill also vouch for the bb7's like everyones been saying, the pads are extremely easy to adjust, and they have really good power once the pads are bedded.
bb7's also but if you like the way bmx brakes feel...somewhat squishy you can definately run a bmx lever on a cable disc, I am currently running a Dia Compe Tech 77 (best bmx lever ever made) with a POS hayes mx2 caliper.
The biggest problem with them with regards to total power output is likely cable stretch. Is there any company that makes extremely high strength/low-stretch cables? Wound steel cables stretch and get fouled in poor weather- even the coated or sheathed ones- as anyone with a derailleur knows. I've always wondered why the incredibly low-stretch/high strength/unfoulable/lightweight/slick braided synthetic lines used in some fishing applications have not been adapted to cycling use yet. Somebody should research this and try to make a ducat because the technology is there and I know I am not the only one who is sick of having rides ruined by hydro leaks, air bubbles, fluid vapor fade and dealing with their overall maintenance bitchiness.
The biggest problem with them with regards to total power output is likely cable stretch. Is there any company that makes extremely high strength/low-stretch cables? Wound steel cables stretch and get fouled in poor weather- even the coated or sheathed ones- as anyone with a derailleur knows. I've always wondered why the incredibly low-stretch/high strength/unfoulable/lightweight/slick braided synthetic lines used in some fishing applications have not been adapted to cycling use yet. Somebody should research this and try to make a ducat because the technology is there and I know I am not the only one who is sick of having rides ruined by hydro leaks, air bubbles, fluid vapor fade and dealing with their overall maintenance bitchiness.
This is a valid argument although I've found with cable discs that the el cheapo pyramid and such cables outperform the higher end jagwire cables and the like. Also, changing out a cable is far less a pita than replacing hose/bleeding. It normally took about 6 months of abuse before I'd change the cables on my trail bike. I'd still be running avids if I hadn't scored a set of champagne hayes for nuthin' - avids are still my back up though
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