I'm considering a Rohloff Speedhub for my next bike, but I like drop bars. The factory Rohloff shifter is a grip-shifter that mounts on 22.2mm diameter straight bars, rather than 23.8mm drop bars.
Because the indexing for the hub is all in the hub itself, rather than in the shifter, I think I could design and print a pretty nice grip shifter for drop bars, or possibly some sort of fat lever shifter, even. The most reasonable drop bar mounted solution that I'm aware of is Comotion's $250 shifter, which looks very nice, and seems to be milled out of nice metal parts, but frankly, I'd rather design and print something, so that a not-$250-solution will exist.
I don't think the actual CAD bit will be all that difficult; I have a fair bit of OpenSCAD experience, and the parts aren't all that complicated. I think. But, I'm wondering if anyone here has any tips about designing long-wearing all-weather printable bike parts.
I'm also wondering if anyone around here owns a Speedhub and would be interested in beta testing. I don't have that bit yet, and while the spec sheet from Rohloff is quite detailed, there's no substitute for trying it out.
I am unsatisfied with the commercially available bike lights.
They are either expensive, use uncommon battery types or can easily be stolen (when left on the bike).
Therefore I am willing to design a custom bike light. However, I could not do that on my own.
Would you like to join this project?
These are my design goals:
- water proof
- runs on a single AA or AAA battery
- hard to steal (maybe fixed with an "unusual" screw)
- runs on at least 4 LEDs
I already made some sketches for the design, but I lack the technical knowledge for the circuit.
Please tell me what you think!
The Tektro RRL brake levers are arguably the best drop bar brake levers I've ever seen. The Tektro RL-340s & similar models (short pull version) are decent, but could be made more comfortable (in my opinion) if they had a smooth transition between the hood & the tops, in a modern style (see any current Shimano, SRAM, or Campagnolo brifter-to-handlebar transition).
TRP packages an extra shim with their RRL levers to achieve this effect: http://trpbrakes.com/pubs/RRL%20Brake%20Lever%20(B5).pdf (instructions).
Purely by guess, I think the shim may also work or be easily adapted to other Tektro models, & maybe beyond those too; I'm assuming the plastic body is roughly the same where it contacts the handlebar, so filing could bring it into a good shape.
Here is a picture of the shim: http://biketouringnews.com/wp-content/uploads/2012/03/IMG_2999.jpg
Perhaps using 3D scanning, the shim can be modeled for ease of 3D printing.
Without the shim, users are forced to choose a very "classic" hood-to-handlebar position (https://farm8.staticflickr.com/7063/6936342796_7a6741ee54_z.jpg) which hurts my & probably other people's wrists.
You can either do #1 (above) or #2 position them so the hood is flat, but that forces the whole body to move down past the tops: http://cdn.velonews.com/wp-content/uploads/2015/05/26.jpg
I've been getting by using old/broken Shimano brifters as brake levers, but this can be an expensive/hard-to-get alternative for other people.
I don't have one of these lovely brake levers though, & guessing the (intricate) geometry behind them is out of the question. Does anyone have one?