spbike

Link or search terms? I looked on AliExpress with a couple variations of fillmore, fillmore valves and related and didn't see any.

@tomo12377: Likely so they can use the same one on e-bikes.

Gotta be careful, pedals have quite a bit less traction than tires.

Actually no, steel doesn't do the same thing, it does better. Aluminum is the lightest of the 3, also the weakest. But if your constrained by size can be used for a favorable strength to weight ratio. It's also VERY easy to machine, cut, sand, shape, and weld. Tubes can be butted, shaped, bent, etc, thus it's popular with early dual suspensions with a zillion different designs for the rear suspension. Titanium is stronger, but much harder to machine, harder on tools, hard to weld (can't expose to o2), and hard to shape. It's memory makes even something simple like bending a tube hard, since it will return to it's original shape ... until you go too far, and might not return to where you want it. Steel is stronger still, easy to weld and machine, but not as easy as aluminimum. Doesn't foul tools, and doesn't require a nitrogen bath to weld. It's by far the strongest of the 3 if you are size constrained. So for things that can be any size/shape, aluminum is often the best, so it's cheap/easy. It's particularly friendly to CNC machines or tig welding. Ti is stronger, but MUCH harder to machine or weld. Best for relatively simple things, which is why Ti frames are much close to simple triangles than aluminum frames. However for maximum strength and maximum life for any fixed size, like a chain ring, steel will be more durable, stronger, stiffer, and cheaper.

I was surprised to not see my #1 pet peeve for bikes. Noise. Cassette noise (especially angry bees), brake squeals, squeaks anywhere, etc.