Welcome to the story of my GreyBorg Warp and Cromotor Super Commuter electric bicycle. It has been a wonderful journey and it eats up a lot of miles commuting when the weather is good. Here's a view of it six months after starting the project. The goal wasn't to build it in one day, but to build something worth having and a reliable and excellent tool for my daily commute, to learn something, and to meet people and make new friends (though I didn't realize all of that when starting out). A big thanks to those who have helped make this build a reality, especially Stevil, and the GreyB.org folks Hal9000 and Accountant, and their US dealer, zombiess. Also Lyen, johnrobholmes, icecube57 and many others also helped out in various ways. Thanks to all!
Edit - in March 2015 the Multistar battery upgrade has increased the battery from 1.4 to 2 Kilowatt Hours! Details on page 33-35.
Above is a July 2012 photo (just after we got it running, but before the commuter trunk rack was installed). This commuting machine continues to evolve, but we're getting ahead of ourselves. A few posts down this page I've edited in a more nearly current list of components in the current version of the project.
Now back to the Beginning, or how it all started:
December 25, 2011
Happy Holidays, All.
Let's assume for a moment that Christmas 2011 has been good to me and I'm going to get to build a Greyborg Warp with a Cromotor.
There are many choices to make along this road. Let's visit them and see what folks have to say about these choices. I've read most of what I can find about the 'Borg, but there are many things I have not found on these topics.
Some of my Use Cases:
a) commuting, hilly 13 miles each way, up to 15% gradient, 1200 feet rise one way, 600 feet the other.
b) camping, various terrain from streets to dirt roads and the occasional trail in the desert or Sierra, etc mountains.
I would prefer to keep this a bicycle and avoid having it be too much a motorcycle, insofar as practical. Somewhere between Bicycle and MoPed, perhaps.
Some Choices to make (there will be more later, I'll pick a few to start):
1) motor - Cromotor, other hubmotor, or RC?
2) forks - The GreyB.org 'dual disc' offering, or other?
3) crankset - Schlumpf or ?? what gearing??
4) rims and tires - bicycle, moped, or light motorcycle?
Thanks in advance,
Other Greyborg builds and useful links
https://endless-sphere.com/forums/vi ... hp?t=25973
http://www.carolinarovers.info/index.ph ... Itemid=150
DIY Rivnut Tool
http://www.competitivecyclist.com/revie ... n_779.html
https://endless-sphere.com/forums/vi ... =2&t=31518
current based throttle via CA
https://endless-sphere.com/forums/vi ... =2&t=55211
My Other Threads of Interest
https://endless-sphere.com/forums/vi ... =3&t=28112
Ebike Electronics System Planning
https://endless-sphere.com/forums/vi ... =3&t=21390
My Commuter Mountain Ebike, an REI Novara/9C
https://endless-sphere.com/forums/vi ... =3&t=35954
My Long Distance Comfort Recumbent, a BikeE/BMC
https://endless-sphere.com/forums/vi ... =3&t=27751
Son's Puegot Mountain Bike/9C Commuter