...the ceiling is not horizontal.

I've seen allot of instructables showing DIY hoist things with hooks for bikes but only for horizontal ceilings. I have beams like the inside of a roof, to work with. Would the same work on this kind of ceiling?

I have different bikes as well, so it should work for different bikes, ranging in weight.
- Specialized Allez, triathlon conversion
- Motobecane super mirage, converted to fixed
- Renault endurance, road bike.
- Trek mountain bike.
- Felt bandit chopper.
- Girlfriends fixie.

Any ideas?

Maybe first you could hang a length of 2x4 from one of the sloping beams. Fixed lengths of rope - one end of the 2x4 shorter rope, the other end longer - so the 2x4 hangs horizontally. Then attach the "instructables" hoist to that. Perhaps it would sway around too much. Just a thought.

Unless the roof has a serious pitch (like it's a A frame or something) you're probably ok.
The bike doesn't absolutely have to hang horizontally, does it?

Or do the instructables actually not function if the roof isn't horizonal?

I have some hangers in my garage that I bought off ebay. The kits were dirt cheap (around $15 each). It's comprised of 2 brakcets that go onto the ceiling, each one with a hook (one for the seat & one for the handlebars, with one long rope holding it all togheter. I wouldn't see any reason why this wouldn't work on a ceiling with beams coming down, as long as the beams weren't between the two brackets.

if you rotate 90 degrees you will have a parallell surface to work with. no?

I thought about installing a bike hoist or two, but the ceilings in my garage are like 14' high and would be a hassle. Instead I installed some wall-mount bike hangers that work really well and are very space efficient.

Just buy one of the many ceiling mount bike hoists that are available. Four pulley's and a rope. They don't care that your ceiling is sloped.

https://www.amazon.com/Neiko-Bicycle-.../dp/B001ENZFGQ

If you live in seattle, you can have my pulley hoist since I no longer need it.