Re: [RBW] Re: Riding backwards.
on 11/17/10 11:26 AM, Jeremy Till at [email protected] wrote: > Retro-direct drivetrains were developed in the early years of multi- > speed bicycles as just another way to have multiple gears, around the > same time that IGH's and modern derailers were being developed and > before either of those were perfected enough to become ubiquitous. I > suppose an advantage over the other two systems is that it doesn't > "shift" per se--both gears are always engaged--so there's fewer > movable parts to break. Anyone interesting in more info on Retro-Direct should also search through Kent Peterson's blog - he's cobbled a couple together and written up some good descriptions of them. e.g. - http://kentsbike.blogspot.com/2008/12/retro-direction-perfection.html There's also an excellent discussion of them, with images, in Frank Berto's "The Dancing Chain". - J -- Jim Edgar [email protected] "One Cog - Zero Excuses" L/S T-shirt (and others!) - Now available http://www.cyclofiend.com/stuff Cyclofiend Bicycle Photo Galleries - http://www.cyclofiend.com Current Classics - Cross Bikes Singlespeed - Working Bikes Gallery updates now appear here - http://cyclofiend.blogspot.com -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
Re: [RBW] Re: Riding backwards.
I believe he was filmed riding the retro-direct bike forwards and they're playing the video backwards, or did I miss someone saying that already? Aaron On Tue, Nov 16, 2010 at 2:01 PM, William wrote: > OK, here's a real brain-tweaker. A retro-direct bike cannot be rolled > backwards under any circumstance. You have to pick up the rear wheel > to back up the bike. Wrap your head around that. > > On Nov 12, 4:15 pm, erik jensen wrote: >> i finally understand. >> >> e >> >> >> >> On Fri, Nov 12, 2010 at 3:51 PM, William wrote: >> > Either you're missing something or I'm missing what you are saying. >> > The key for retro direct is that there have to be two independent >> > freewheel mechanisms because when one is driving the wheel, the other >> > one is freewheeling backwards. You can't just use two cogs on one >> > cassette, because that cassette body cannot simultaneously be rotating >> > forward and backward. >> >> > On Nov 12, 3:33 pm, erik jensen wrote: >> > > for the cheapest route, why not match chain differences between the two >> > > front chainrings across a typical cassette? then you wouldn't need to do >> > > much other than wrap the chain and maybe replace the unused cogs with >> > > spacers. >> >> > > ie. 46x34 front matched to 16x28 rear >> >> > > maybe i'm missing something, but that seems like it'd work. >> >> > > ~erik >> >> > > On Fri, Nov 12, 2010 at 1:19 PM, Z I wrote: >> > > > I saw these being used in one of the youtube videos on this. This is a >> > > > good resource.. $75 seems pretty steep though. Unless you compare it >> > > > the two-cog White Industries freewheel Riv sells! I guess that's what >> > > > an "An eccentric bike nerd building a retro-direct bike" has to pay. A >> > > > 26T sounds just about right. >> >> > > > I'm going to root around amongst the bike parts at the bike co-op and >> > > > see if I can put some sort of large freewheel together myself first. >> > > > At least for the first attempt. >> >> > > > -- >> > > > You received this message because you are subscribed to the Google >> > Groups >> > > > "RBW Owners Bunch" group. >> > > > 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. >> >> > > -- >> > > oakland, ca >> > > bikenoir.blogspot.com >> >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "RBW Owners Bunch" group. >> > 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. >> >> -- >> oakland, ca >> bikenoir.blogspot.com > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > 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. > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
Re: [RBW] Re: Riding backwards.
i finally understand. e On Fri, Nov 12, 2010 at 3:51 PM, William wrote: > Either you're missing something or I'm missing what you are saying. > The key for retro direct is that there have to be two independent > freewheel mechanisms because when one is driving the wheel, the other > one is freewheeling backwards. You can't just use two cogs on one > cassette, because that cassette body cannot simultaneously be rotating > forward and backward. > > On Nov 12, 3:33 pm, erik jensen wrote: > > for the cheapest route, why not match chain differences between the two > > front chainrings across a typical cassette? then you wouldn't need to do > > much other than wrap the chain and maybe replace the unused cogs with > > spacers. > > > > ie. 46x34 front matched to 16x28 rear > > > > maybe i'm missing something, but that seems like it'd work. > > > > ~erik > > > > > > > > On Fri, Nov 12, 2010 at 1:19 PM, Z I wrote: > > > I saw these being used in one of the youtube videos on this. This is a > > > good resource.. $75 seems pretty steep though. Unless you compare it > > > the two-cog White Industries freewheel Riv sells! I guess that's what > > > an "An eccentric bike nerd building a retro-direct bike" has to pay. A > > > 26T sounds just about right. > > > > > I'm going to root around amongst the bike parts at the bike co-op and > > > see if I can put some sort of large freewheel together myself first. > > > At least for the first attempt. > > > > > -- > > > You received this message because you are subscribed to the Google > Groups > > > "RBW Owners Bunch" group. > > > 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. > > > > -- > > oakland, ca > > bikenoir.blogspot.com > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > 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. > > -- oakland, ca bikenoir.blogspot.com -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
Re: [RBW] Re: Riding backwards.
for the cheapest route, why not match chain differences between the two front chainrings across a typical cassette? then you wouldn't need to do much other than wrap the chain and maybe replace the unused cogs with spacers. ie. 46x34 front matched to 16x28 rear maybe i'm missing something, but that seems like it'd work. ~erik On Fri, Nov 12, 2010 at 1:19 PM, Z I wrote: > I saw these being used in one of the youtube videos on this. This is a > good resource.. $75 seems pretty steep though. Unless you compare it > the two-cog White Industries freewheel Riv sells! I guess that's what > an "An eccentric bike nerd building a retro-direct bike" has to pay. A > 26T sounds just about right. > > I'm going to root around amongst the bike parts at the bike co-op and > see if I can put some sort of large freewheel together myself first. > At least for the first attempt. > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > 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. > > -- oakland, ca bikenoir.blogspot.com -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
Re: [RBW] Re: Riding backwards.
I'm with you, Zach. Quite intriguing. I've been googling this subject for the past several days. There are only one or two good examples of this system, the others are pretty rough hacks. I agree that a SO rigged accordingly would be something I'd take a long look at. From: Z I To: RBW Owners Bunch Sent: Fri, November 12, 2010 11:40:30 AM Subject: [RBW] Re: Riding backwards. Man, I love this video. I've never heard of a retro-direct drive before. I've also never been particularly excited about single speed bikes since I moved up to geared ones when I was a teenager, but the mechanic/engineer side of me is fascinated by this retro-direct drive. I think a SimpleOne with a retro-direct drive option would be awesome. I'd buy one. In the meantime, I think I'm going to try and put one together one this winter from parts at the local bike co-op. - Zach -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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. -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
Re: [RBW] Re: Riding backwards.
man. now i want a retro-direct SimpleOne. -andrew -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
Re: [RBW] Re: Riding backwards.
On Tue, Nov 9, 2010 at 8:25 AM, rperks wrote: > Same here, and while I "get it", take a close look at the chain line > on that bike. Is it a kickstand making it look odd or are there other > things going on down there? > > Rob - who shold never watch things that make the brain work too hard > right befor bed > Here's the bit that confused me: They've played the video backward and had everyone doing everything in reverse so that john could ride forward and have it look like he was riding backward. This is all very cool. But why, eventhough the video is being played backward is John pedaling FORWARD and GOING backward. -sv -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. 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.
