It looks really goofy to ride a fixed gear with a useless extra chainwheel on your crank. These track-style stack bolts are the right length to hold a single chainwheel to your crank. They fit all modern cranks.
3 mm chainwheel spacers (set of 5). For budget road-to-fixed conversions, a quick and dirty way to make the chainline work is by spacing the chainwheel inward from the crank spider. This is especially useful if you're using a hub made for a multi-speed freewheel, because it reduces the amount of…
Chainring bolts for double chainrings, also work for the two larger rings of most triple cranks.
Chainring bolts for Old Style triple chainrings, where all three rings are bolted together. Set of five.