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 <[email protected]> wrote: > i finally understand. > > e > > > > On Fri, Nov 12, 2010 at 3:51 PM, William <[email protected]> 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 <[email protected]> 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 <[email protected]> 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]<rbw-owners-bunch%[email protected]> > > <rbw-owners-bunch%[email protected]<rbw-owners-bunch%[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]<rbw-owners-bunch%[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.
