To expand, 700c was the size of tubular rims, and 27" was the most popular clincher size. That may be another indicator of the wheel size.
On Thu, Mar 27, 2014 at 5:05 PM, Tim Gavin <tim.ga...@littlevillagemag.com>wrote: > Many high end 70s bikes were 700c, so it could be either wheel size. To > check, put your Riv wheels on there and measure from the center of the > brake bolt hole to the rim brake surface. > > short reach = 39-49mm (most modern road brakes) > "standard" reach = 47-57mm (old road brakes, tektro 539) > "long" reach = 55-73mm (tektro 559/silver) > > The difference between 27" and 700c is only 4mm at the brakes. (630mm - > 622mm / 2) So "standard reach" brakes like the 539 would probably still > work. But you'll have to measure to be sure. I recently rebuilt an 80s > Raleigh, and changed it to new 700c wheels instead of the 27" originals. > It had "short" reach brakes with the pads at the bottom of the slots. I > put "standard" reach Tektro 539 brakes on it to reach the "lower" rim. > > Harbor Freight sells $3 plastic calipers that are totally sufficient to > measure all these dimensions. > > > On Thu, Mar 27, 2014 at 4:57 PM, Jim Bronson <jim.bron...@gmail.com>wrote: > >> I have an old Eisentraut that is in fairly good condition that's been >> hanging on my wall for way too long. I'd like to build it up in a >> Rivendell-esque sort of way. I'd like to use as many of the parts I have >> hanging around as possible. >> >> The frame has been cold set 130 at some point, so I plan to use the 700c >> wheelset that I took off of my Rivendell, which is Campy Chorus 9 on the >> back. I have a 9 speed silver Campy Record double crankset that would look >> real nice on it, 53/39 is definitely non-ideal, but it's just for now >> anyway. I've got some vintage brakes and levers, as well as some Campy >> bar-end shifters. >> >> But I also have many questions. >> >> Did this bike originally come with 27" or 700c? That will help with >> trying to figure out what kind of brakes I will need with the 700c. If >> it's a conversion from 27" I would assume that the nutted Tektro 559 would >> probably be necessary, or some sort of centerpull with long reach. If it >> was 700c originally then I could probably use the retro Campy brakes that I >> have lying around. >> >> The headset - it's got some "Zeus 2000" headset on it now that feels >> pretty rough. Is this something can can be salvaged or that needs to be >> replaced? If it needs to be replaced, can it use something modern, or is >> it going to be some oddball vintage NOS part? What were the standards in >> the 70s? >> >> The bottom bracket. It has one in there, which I have no intention of >> re-using, but what threads does it have most likely? And will I need to >> run a tap on the threads? >> >> Seatpost - what was most common in the 70s? I haven't the slightest >> inkling of what size it takes. I'd rather not go buy one and have to take >> it back or send it back. >> >> Threaded stem - safe to assume I can use a Tallux that I have sitting >> around, or not? >> >> Any other thoughts? >> >> -Jim >> >> -- >> Keep the metal side up and the rubber side down! >> >> -- >> 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 http://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 http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
