I have a plan - a bold plan - to replace my single speed commuter with a new bike that I would get built up for me by a local builder. This will be the "Supa Commuta"
TM - designed to be more clever than the average bike!
I'm in Hong Kong and these guys
are in China (Shenzhen, just over the border), so easy and clear communication is going to be a problem. With this in mind, I'd like to bounce my ideas off you guys before I wander into another language.
Here is my plan.
Starts simply enough. Lugged steel frame, probably Reynolds 525. Traditional geometry (flat top tube) etc etc.
Here is where I start to get a bit cute.
I'd like to run it as a single speed for now, but have the option of running it with an internal geared hub (possibly belt drive) or even with an older 7/8sp groupset in the future.
I think that using sliding dropouts (like Paragon's
) will make the single speed and internally geared hub work ok.
If we add one of these from Paragon
, we can do the belt drive. Why belt drive you ask? Everything gets rusty and crusty in this town AND maybe I just want to be too clever/stand out a bit.
To go with a derailleur, just swap the dropout part.
Now I have a couple of questions:
If the single speed hubs (flip/flop track) are 120mm, then dropouts at this will be fine for these wheels and also for many 3/5/8 speed geared hubs (Shimano, Sturmley Archer).
However, many multi gear derailleur based groups would require 126mm spacing. Should I spec the bike at some thing like 122.5mm and tighten it up as single speed and stretch it a bit as geared? A couple of mm is not too much to cold set or just to ignore?
Braze on specs
Also, what braze ons will I need to have to accommodate all these uses?
- Standard ones for rear brake - check.
- Two stop on downtube or steerer to allow for front/rear derailleurs using STI or bar end shifters - check.
- Cable stop on chain stay for RD - check.
- Different cable stop on chain stay (opposite facing?) for geared hub?
Can anyone advise?
Am I being too adventurous to try to plan for so many possibilities?