Nice Cranks, Jan

Jan Heiene of Bicycle Quarterly and Compass Bicycles in conjunction with René Herse are re-releasing a very nice looking set of cranks using a three bolt spider, adaptable to either double or triple chainrings (70mm BCD).

My Gitane could actually use a set of these right now as I’m hoping to further upgrade it from 6 speeds to either 12 or, gasp, 18. In the mean time I’ll see what I can find at Via. I really do like the SunTour Retrofriction “bar-con” shifter’s action though.

But yes, the world is in need of some more elegant looking cranks as style has gone out the window, what with all the oversized spindles and external cartridge bearing bottom brackets on bikes these days, so good’on these guys.

René Herse & Compass Bicycles Re-Release Cranks

Link: René Herse & Compass Bicycles Re-Release Cranks

V1 Octalink? 105 or Dura Ace, you choose!

I found this awesome quote in rec.bicycles.tech while looking for setup tips on the old Dura-Ace 7700  Bottom Bracket:

The Octalink crank attachment, its feet of clay, has no preload
between the facets of the square spline and therefore frets (tiny
motion] elastically, even if it has no actual backlash in torque.
Aluminum parts against steel are a classic of this syndrome because
the softer aluminum frets on the steel, and instead of developing
rouge as steel-on-steel does, it makes (hard) aluminum oxide whose
repeated fracture often makes a sharp click.

I haven’t heard your BB, but I have heard such clicks.  This may be
your problem and the reason why Shimano gave up on Octalink.  Elastic
backlash (absence of press fit) is a phenomenon that escapes
recognition in various mechanical devices and gets passed over in
time, even when the reason is not recognized.

Jobst Brandt
So there you have it from JB himself – Octalinks may develop clicking due to their design.  We’ll see.  I’m not sure if the weight savings and extra $30 are worth it for the DA BB-7700 vs the BB-5500 but I’m partial to designs that allow rebuild and proper setup/adjustment, so I think I just might go for it paired with a Sugino Cospea compact crankset.  In my heart of hearts I want a triple with that 12-21 cassette I’m running, something like a 28-38-48 perhaps.  The current 34/44 setup is fine considering I don’t often find myself needing much bigger of a gear than 28+ mph but on downhills it is lacking.  The other issue being crossover gears where I often find myself running 34 x 12-13-14 and realize I need something slightly bigger.

Sugino Cospea Cranks

Sugino Cospea Cranks