Dynamo powered Di2 light touring bike, v2.0
In early 2011 I built myself a bike to ride in a technical trial of sorts called the Oregon Manifest. The purpose was to build a bike that would be ridden over a mixed surface course and it would score points based on whether or not it fulfilled a list of set criteria. It was a fun time and the bike I built has been my primary commuter for the past 6 years but it was time for me to upgrade. There were some things that I was forced to do (integrated lock, kickstand, etc.) that I would never have done on a bike just for myself so I made some design changes and got to work on a new bike in my spare time last year (and there wasn’t much of that with a new baby in my life).
There was one feature which I loved about the old bike and that was the Di2 shifting that was powered off of the dynamo. 6 years of no charging with running lights and silky smooth shifting was too much to give up. So this bike uses some of the components off of that bike but is updated in other ways. I went with a 650B wheel as I’m liking the larger 42mm tires these days. Also, I wanted to incorporate low rider racks into the design in case I wanted to use it for some light touring.
I’ve been on a component manufacturing kick over the past few years so I made the cantilever brakes and stem. The goal was not to replicate my old bike but to build a lightweight bike that could be my weekend rider, light tourer, and randonneur. The result is this Gray Rose Metallic (aka purple) bike that weighs in at 23.5lbs with racks, lights, and fenders. I’ve been riding it through the winter when the weather allows and I’m excited to do many more miles when spring finally arrives in a couple weeks!
Frank
June 17, 2023 @ 2:09 pm
Brain, I have such a crush on this bike it’s embarrassing. The paint job specifically breaks my heart.
Please could tell me what tyres these are? I see you run them on most bikes.
Brian
September 2, 2023 @ 9:48 pm
Thanks, those are the Rene Herse 650x42b Babyshoe Pass Extra Lights.
Mateo
August 25, 2020 @ 10:51 am
Hello Mr Chapman. Could you elaborate on the wiring and details for the Di2/Dynamo Setup? i’m thinking of getting my bike built along these lines, but maybe using a Sinewave revo instead of the e-werk, and a couple supernova lights with a switch
Brian
August 25, 2020 @ 9:28 pm
Hi Mateo, the setup with this circuit only worked with the original Dura Ace Di2. I think The Sinewave Cycles Revolution is a fine option for modern Di2 but charging with the lights on might require some fast speeds. Good luck.
Pete
October 14, 2017 @ 5:06 pm
What rear hub are you using? Also, how do you like the 650b tire size? Any noticeable downside/upsides from riding them? Future bike research…Been dreaming of having a bike like this for years. Such a good looking machine!
Brian
October 16, 2017 @ 1:32 pm
The rear hub is a White Industries MI5. And I love the 650b tire size! I went from 28mm road tires so it was a dramatic change. These wheels allow me to go places I never could on 28mm tires. If it was to be strictly a road bike, I’d probably stick with 700x28c tires though.
Jake
June 23, 2017 @ 12:25 pm
Beautiful build Brian; one of my favorites of all your creations.
Yves
April 19, 2017 @ 5:39 pm
Hi Brian,
this is an amazing bike. Do you need a charge controller or something similar for charging the DI2 battery pack? I absolutely love the combination of classic lugged steel, 650B tires and modern components.
Brian
April 20, 2017 @ 4:36 pm
Hi Yves,
Thanks! And yes, there is a small circuit that is required for the charging. I’ve been using it for the past 6 years with no charging but I’m hesitant to encourage others to make one! 🙂
Take care,
Brian
Tom B
March 9, 2017 @ 5:15 pm
Hi Brian
This thing looks amazing.
I have a chain stay obsession thing going on at the moment. How did you archive clearance with the round stays. Do you bend them. Is the BB shell off the shelf?
Brian
March 9, 2017 @ 8:15 pm
Hi Tom, Thanks for the kind words! The BB shell is the Pacenti for 22.2mm round stays. I think Spectrum is selling them now. The ports are very close to the faces. That with 435mm stays and a dimple are plenty for 42mm tires.