Just bought a Campag Veloce 12/23 10 sp cassette - my favorite ratio range - don't need it yet, as I'm maybe 1/2 way through the expected lifespan of my current 12/23 but I want to ensure that the replacement is available when the time comes. Low tech steel, all separate cogs, but only ~$40, which is the right price for a wear item like a cassette.
Lezyne CO2 inflator head for threaded cartridges - trying to reduce the size of the size/weight of my saddle bag, so replacing the larger and heavier "full container" inflator that I currently use.
Cycliq Fly6 rear light/camera. The light is great, but I have still to get a sense of its endurance. It supposedly signals current battery level with a number of beeps when powered on or off, but while the beeps tell me I have 50-75% left, the bluetooth app says the thing is fully flat. It'll certainly last a 2 hr spin with lights and camera, but I'm unsure about its ability to last for a 4-5 hr ride - maybe camera only.