I have the Tektro 720 on my 2009 Sam, and have been impressed with their power and good enough modulation. Inexpensive, too. But I do get significant brake shudder. I was surprised to read that Jan says the 720s are too flexible to function optimally. I haven't noticed this. Logic would tell me if I'm experiencing brake shudder, the fork is flexing under load and the brake's stiffness is not a factor. What am I missing?
On Wednesday, January 11, 2017 at 8:25:56 AM UTC-8, Matt B. wrote: > > I like tektros 720s for modern cantis. The wider profile works great, > they're nicely made and and have a brilliant hanger design. For my older > bikes with 65-75mm post spacing the diacompe 981 or 983 are golden for the > money. > > On Wednesday, January 11, 2017 at 7:42:45 AM UTC-5, Michael Hechmer wrote: >> >> Steve, I agree with you about Jan's riding, vs my riding. He is a more >> powerful rider and rides more aggressively than I. No doubt he pushes >> brakes to the limit, in a way that I rarely do.... just the occasional >> escape the pick-up that just right hooked me; and then I don't care about >> modulation at all. >> >> I also agree with people about set up. I have had 4 different cantis - >> shimano, tectro, di-compe and Pauls. The shimano weren't too bad but the >> cable pull wasn't matched to SIS ultegra levers. The di-compe weren't too >> bad to set up, but the power was disappointing. The tectros baffled me >> completely. After some experience, I find the Pau's a breeze to set up. >> >> Michael >> >> On Tuesday, January 10, 2017 at 5:38:52 PM UTC-5, Steve Palincsar wrote: >>> >>> >>> On 01/10/2017 05:06 PM, Michael Hechmer wrote: >>> > Probably like a lot of us, I got an email announcing a Jan Hein blog >>> > comparing rim & disk brakes. Now, I have almost no experience with >>> > disk brakes but much of what I read makes me think they could be a >>> > good choice for some bikes. I found myself saying, not my experience, >>> > when he compared posted CP and canti brakes. Jan has a phenomenal >>> > amount of experience that's hard to challenge, but.... My experience >>> > of modulation with good, and I emphasize good, cantis has not been any >>> > less than with good CP brakes. The issue of shutter, which he raises >>> > with cantis, because they mount lower on the fork than CP brakes, >>> > seems, to me, to be related to the skill of the bike builder. >>> >>> And also, evidently, shudder is particularly common with carbon forks. >>> >>> > >>> > Here's my experience with Cantis vs CP brakes. My early Saluki, with >>> > Paul's cantis offers excellent stopping power and modulation that is >>> > just as good as the Pauls's CP brakes on my Rambouilet. I originally >>> > had Pauls posted CP on my tandem with 38 mm tires and converted the >>> > frame to cantis in order to go to 45mm and switched to Paul's >>> > neo-retros. There is no difference in modulation, the cantis might >>> > offer a minute amount of extra braking (when set up properly). >>> > However a tandem might not be an exact comparison to braking on a >>> > single. The extra mass is huge, but the extra weight in the rear (no >>> > offense honey) helps to keep the rear wheel planted and adds to rear >>> > braking power. >>> > >>> >>> Quoting from the blog entry: "The problem is that the stiff [cantilever] >>> brake is attached to the flexible fork blades or seatstays, which >>> twist when you brake very hard. This changes the toe-in of the brake >>> pads and results in poor modulation." If you have sufficiently stiff >>> fork blades and seat stays, this won't happen; and if you don't brake >>> "very hard" (which, from what I gather reading his many comments on >>> this, is something most of us never do - at least, not as hard as he >>> does) it won't happen. >>> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
