Neat

cycle.jog.fm/workout-songs/for/90/rpm

Pick an RPM, get songs about that speed

also found this gem on strava - disjointed roads

strava’s view of openstreepmap shows that, but OSM proper is correct.

@gschenk I don't see any problems with adding 5 mm of spacers at each side. The old freewheel hubs had drive side bearing almost at the center of the axle and still they often lasted for thousands of kilometers.

Wouldn't two spacers be worse than a single one? I imagine a mode with wooden building blocks: without spacers you clamp a single block (axle) in a vise (drop outs).

Wouldn't two spacers be worse than a single one? I imagine a mode with wooden building blocks: without spacers you clamp a single block (axle) in a vise (drop outs). With one spacer it is like clamping a stack of two blocks. With two spacers its a large block in the centre with two small at the vise.

For the last case the central block can slide out between the two smaller blocks when loaded perpendicular to its long axis.

Stacking the spacers is okay,as long as they're thick enough. Problem is the extra unsupported length.

I doubt that. The hooked thing is only held together in radial direction by friction. Four joints with no constrains in the plane of their interface. There is also nothing that centres the spacers.

Even if perfectly aligned during wheel assembly, the first decent pothole will push the wheel up, it will take its axle with it and then there axle will be subject to radial forces. However, it can only take axial tension (it is practically just a hollow bolt as in screw).