I have been ogling Jan Heine's
(Compass Bicycles) Rene Herse cranks since they made their entrance in early 2012. I thought the new Herse cranks in a double would make
a good replacement for my Sugino 46-36-26 triple. I rarely use the
very low 26 ring and the 36 often seems a bit high in some of the
steep dirt roads I often ride. The Sugino double would work as
well......but alas, the beauty of the highly polished Herse had me
hooked.
Before making my final decision to
purchase the Herse cranks, I contacted Jan and asked if the cranks
would be compatible with the 113mm JIS spindle on my Phil BB. After
Jan's affirmative response I ordered the cranks a few days later and
within a week there was a delivery on a Friday afternoon. The
package was eagerly opened to reveal a piece of beautiful bicycle
jewelry awaiting a bicycle to adorn.
Sugino cranks pulled, spindle and
threads cleaned and greased.... The Herse cranks placed on tapers and torqued to 25 ft lbs... A New Shimano cx-70 front
derailleur and SRAM pc850 chain installed and adjusted. The only
thing left to do is to hang the bike from the rafters to await a 6 am
departure Saturday morning.
Pedaled off as usual on the usual
weekend ride with all systems go and the new additions to the drive
train running as smooth as one could wish for. Then it
happened..... About five miles into the ride I felt my left shoe
coming loose from the pedal... Loose cleat perhaps? Well needless
to say that was not the problem. I stopped immediately to check on
the problem and soon discovered that the left crank bolt had managed
to back out leaving me with a loose crank arm. Without a 15mm
socket there was no chance for me to tighten things up on the road so
I limped back to the house to re-torque both bolts. At that point I
realized I should have gone around the block a few times and re-torqued before embarking on a journey that would leave me coasting
home because I did not have the proper tools in my kit. Once things
were tightened up I headed off for a 25 mile ride and returned
without experiencing any more “loosening up” problems.
For the next few rides I checked the
torque before leaving and carried a 15mm socket and wrench as
insurance. As of now the bolts and crank arms have settled in with
the proper torque and with that I am confident I no longer need to
carry “insurance” tools.
The Sugino cranks and the Shimano 105
triple derailleur performed well and made for a very solid and
reliable drive train. However, the Herse cranks paired with the cx-70
derailleur not only provide very smooth shifting.. the drivetrain has
gone from quiet to almost silent. When the cranks are turning the
rings are very concentric and display a negligible amount of runout.
I do not have other cranks that spin as true as these. My first thoughts, the Herse cranks definitely have enhanced the form and function of my Heron Wayfarer.