If your bike currently fits 700 x 38, then the R559/Silver brake calipers may not offer enough reach (19mm greater) for 650b wheels.
R559/Silver calipers are great for 650b conversions of frames designed for "short reach" (39-49 mm reach) brake calipers. If your bike fits 700 x 38, then it's already using at least "medium-reach" (47-57 mm) calipers. Measure the reach now, add 19, and then see if it fits within 73 mm (R559/Silver calipers) or 78 mm (Dia-Compe centerpulls). Sent from my iPhone > On Aug 24, 2016, at 7:17 PM, René Sterental <orthie...@gmail.com> wrote: > > Thanks for the insight Toshi. I guess I'll give it a try at some point and > see what happens. More as an experiment than a true need. I figured the BB > drop based on both wheels having 38mm tires, not a skinnier one on the 700c. > > René > >> On Wednesday, August 24, 2016, Toshi Takeuchi <tto...@gmail.com> wrote: >> I've used the Tektro R559 for multiple 700c to 650b conversions, so they do >> work. The amount of brake reach that is required for the conversion will >> depend upon the placement of the brake bolt in relation to the wheel, which >> is not fixed from bike to bike, so looking at the wheels themselves will not >> give you an answer. It will also depend upon the width of the rim: the >> wider the rim, the less reach required. Also you can gain a couple mm by >> using MTB V-brake thin pads. People have also shaved a mm or two by filing >> the frame at the center bolt. You can get additional reach using a Diacompe >> 750 centerpull brake, but the stopping power is not as effective as the >> Tektros in my experience. >> >> --Also the BB does not drop the same 2 cm. You use wider tires with a >> larger radius, so the BB height will go up from the larger tire. The 650b x >> 42mm gives a similar BB height to a 700c x 25mm. >> >> Toshi >> >> >> >>> On Wed, Aug 24, 2016 at 4:56 PM, René Sterental <orthie...@gmail.com> wrote: >>> Hi all, >>> >>> Perusing the RBW website, I came upon the Tektro R559 that come on the >>> Homer and Cheviot since the Silver brakes stopped being. I'm not sure if >>> they're the same brake as the Silvers I got with my Homer originally, but >>> there was a line there stating that they were good for 650b conversions. >>> >>> I measured my 700c and 650b wheels, and there is a 2cm difference in the >>> radius to the braking surface of the rims. Does anyone know if there is >>> that much room to adjust the brake pads on a 700c bike if you put 650b >>> wheels on it? >>> >>> I know the BB drops the same 2cm which may create problems, but I'm quite >>> intrigued by this conversion. I haven't yet called RBW to ask, but I wonder >>> if any of you experts who have done conversions in the past know if these >>> brakes would truly allow me to run 650b wheels on one of my 700c bikes. >>> >>> Thanks! >>> >>> René >>> -- >>> 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. >> >> -- >> 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. > > -- > 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. -- 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.
