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Soma Grand Randonneur

An experimental platform for lots of new ideas: - 1x drivetrains - low trail geometry - 650b wheels - long ramp drop bars

Soma Grand Randonneur V.2, 52cm

Soma Grand Randonneur / FSA Duron X 1" Threaded

Crankset/Bottom Bracket:
Sugino RD2, 165mm / Tange 103 mm

Shimano PD-A600

Shimano CS-M8000 11-46t / Raceface Narrow-Wide 40t / Shimano CN-HG901-11

Deore XT M8000 GS / Dia-Compe 11 Speed Downtube Shifter

Compass Maes Parallel, 42 cm Superlight / Newbaums Burnt Orange Bar tape / Sim Works Sim Drops Bar Ends / Nitto Technomic 90mm x 17deg

Gilles Berthoud Aravis, Cork / Sim Works Beatnik 300mm

TRP RRL-SR / Tektro CR720

Front Wheel/Hub/Tire:
Pacenti Brevet 650b / Shutter Precision PD8 32H / Sapim Laser Spokes / Compass Babyshoe Pass 650b x 42c TC/ ControlTech Race Skewer

Rear Wheel/Hub/Tire:
Pacenti Brevet 650b / Shimano 105 5800 / Sapim Laser Spokes / Compass Babyshoe Pass 650b x 42c TC / ControlTech Race Skewer

Gilles Berthoud GB25, Velo Orange light mount, PDW Bell, Honjo H50 Hammered Fenders, Busch and Muller IQ Premium Cyo, Busch and Muller Secula Tail Light, King Cage Iris Cages

More Info:
Tried out some new wire harnessing techniques for the rear light. A single hot lead runs through the fender rolled edge to the tail light. The ground runs through the fender into a ring terminal at the bb shell.

Bike History

Click a link below to see past stages of this bike.

  1. Initial Release
  2. Revision 01
  3. Revision 02

Added by soitgoes. Last updated about 5 years ago.



zonaut says:

I meant the cable routing for the front light. Because I usually see lights where the cable is wrapped around the fork blade. But yours is hidden

Posted over 2 years ago


soitgoes says:

Ah ok. I used helicopter tape on the inside of the fork leg for the Dynamo wire. The rear light is wired to the front light. Its wire runs through the rolled edge of the rear fender, under the bb and downtube and then through the front fender before terminating at the front light.

Posted over 2 years ago


zonaut says:

How do you route the front light?

Posted over 2 years ago


soitgoes says:

front light is mounted to the rack. Nitto makes a light mount that fits most dynamo headlights.

Posted over 2 years ago


SirSoyrizo says:

gorgeous bike

Posted over 4 years ago


megarange says:

I do love that Ultra-Total-Galactic-Range sprocket

Posted almost 5 years ago


Ashok_Captain says:

Genius! Agree with the bell placement comment. Nice to see a Gilles Berthoud out there. Your wheels sound pretty serious too! Cheers and thanks for sharing!

Posted about 5 years ago


soitgoes says:

thanks! They help it feel faster than its 26 lbs imply.

Posted about 5 years ago


moose says:

gat dang this bike is beautiful

Posted almost 6 years ago


jon_one says:

Everything about this is awesome but the bell placement in particular is my favourite

Posted about 6 years ago


8aaron8 says:

Awesome. I love the practicality of the build, I'm sure it's a fun ride.

Posted about 6 years ago