Clunkerbike

No, they really do! As a weird example, I've been "researching" Arduino-based, robotic drum machines - Heath-Robinson affairs that allow a drum machine to play a real drum kit, instead of stored sounds. How do bicycles make this better? Bowden tubes. "Bowden tube" is the engineering name for the outer sheath of a bicycle's mechanical brake cable. You might call it "the hose" or just the "outer." The whole mechanical brake cable has not been used on one, single robotic drum system I've seen, yet, for the hi-hat, the upper and lower cymbals that a drummer operates with a pedal, as well as hitting with sticks, all have these complex linkages and gadgets and firmware code that gives the effect of half-pedal, rather than an actual half pedal. They using car door lock actuators (solenoids) to do this, these things are on or off, they don't have a half position. Or do they? Spoiler alert, they do, but the solution is mechanical. The...

Hmm, the test hub I bought is a 130mm. However, I may be able to reduce the spacing on the non drive side to shrink it enough to fit. And probably relax the bearings a little, which are way too tight! It's not QR, so that won't be a problem, it's bolt one, so there'll be a tad more protrusion, is all, and that'll be handy for mounting the derailler hanger. Will need to dish the wheel a tad more, though, as a result.

Six years ago, I invented a thing called Dryline . My back brake, a mechanical disk, had shat itself. It wouldn't operate from handlebar, but could be operated at the brake caliper, itself. Had to be the line. It was, after a few hours of googling, I discovered this is a problem with mechanical disk brakes mounted inside the rear triangle. The cable fills up with water and road grime in winter and, unlike the old days, when bikes were designed with sheath sockets and open cabling, but disk brake frames have to make way for hydraulic lines, so by extension, mechanical cables have to be sheathed all the way, too. The problem is solved by installing a "cable vent" below the caliper, but above the bottom bracket. I couldn't find such a thing, so I invented one. I designed it, boaught a 3D printer, and made several, before settling on this design. (I'd forgotton the old cable runners that used to be under bottom brackets, BTW, that's another possible solution, if ...

There are these little "caliper to cantilever" brake adapter things that increase the cable pull by roughly 33% length, and they can also be used to addapt 6 speed friction thumb shifters to pull a derailleur accurately over a Shimano 10 speed MTB cassette. They say, "You can't friction shift reliably above 9 speed." Yeah, right. It's just about pull length and cog pitch, so there are always ways. These little adapters can be had for AU$17 on eBay and will change 1.2mm pull per cog thumb shifter to modern Shimano 1.6mm mountain cog pitch. The way they work is, the cable enters the pulley on a small diameter section, where a small movement results in a particular angular change. The cable then wraps around that small pulley and transfers to a larger pulley, fixed to the smaller one, such that the angular change results in a longer travel around the larger pulley so, as the cable exits the larger pulley, it creates a larger travel on a brake lever... or on a ...