[RBW] Re: Forget bike weight: let's talk about the Portacatena!
saw that earlier - very nice milling on the dropouts to make room for the portacatena. On Tuesday, January 15, 2013 10:04:48 AM UTC-6, Marty wrote: > > Chris Bishop in Baltimore has a bunch of photos of his effort to install > one on a custom 650b Rando here. Lots of detail for both the single and > double bolt version shown. (he used a single on the rando frame) One of > many amazing details he used on the bike, which one best lugged frame at > the 2012 NAHBS. > > http://www.flickr.com/search/?w=27337921@N03&q=Portacatena > > -- 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/-/WhJ4ctN0reQJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Forget bike weight: let's talk about the Portacatena!
Chris Bishop in Baltimore has a bunch of photos of his effort to install one on a custom 650b Rando here. Lots of detail for both the single and double bolt version shown. (he used a single on the rando frame) One of many amazing details he used on the bike, which one best lugged frame at the 2012 NAHBS. http://www.flickr.com/search/?w=27337921@N03&q=Portacatena -- 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/-/hJAwEnK_HngJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Forget bike weight: let's talk about the Portacatena!
Patrick, Your attached photo (must be from Flickr?) is a pic of my 1980ish Colnago super. I think the chain rest idea is super slick, and works very well. The rear end is spaced at 126mm, and I'm using a regular 5 cog 14-24 Regina Oro freewheel. I know someone who is using an "ultra 6" freewheel in a similar era Gios - it apparently works fine. My Colnago come with the dropouts already tapped for the PC, I just chased the threads. I've seen a 1978 Colnago Super with the same dropout casting, but the holes were not yet drilled and tapped. You may be interested to know that Campagnolo also made a single bolt version with works with any long horizontal dropout. I put one of those on my 1974 Bill Davidson, and it also works great. I'll try to attach a pic. Here's the link, just in case: http://www.flickr.com/photos/39151498@N07/8197764689/in/set-72157625243085418/ Cheers, Alex -- 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/-/dqaYeC7n9qMJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Forget bike weight: let's talk about the Portacatena!
I would think that with the prevalence of STI/Ergo/Rapidfire/Gripshifters and their lack of a lockout, it will be a significant liability when one attempts to upshift to a larger gear while pushing super hard and got...nothing but a freewheeling crank with its associated crash. Bishop Bikes made a rando bike with an integrated portacatena: http://www.flickr.com/photos/bishopbikes/sets/72157628089348263/ I saw that in person at NAHBS-2012 and it was pure sex on wheels. On Sunday, January 13, 2013 8:07:49 PM UTC-8, Patrick Moore wrote: > > http://campagnolo.wikispaces.com/Portacatena (Scroll down a bit.) > > And of course Eric knows about it: > http://campyonlyguy.blogspot.com/2010/08/today-history-lesson-portacatena.html > > That's a really neat device, too -- wonder why it never became more > popular. Much better to have a chainrest and easy wheel removal instead of > another blanking cog. I wonder if I can jury rig something on the Ram I am > building up. I am using (for the moment) seven speed freewheel wheels while > the Ram has (I've been told) 132.5 OL spacing. > > -- > > - > Patrick Moore, Albuquerque, NM, USA > For professional resumes, contact Patrick Moore, ACRW > http://resumespecialties.com/index.html > - > -- 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/-/ikk6-qCxLJ8J. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
