So, is there anything new in the land of bolt on cogs? Is Tomicog still the cheapest? Has Boone actually made a cog in the past five years? Has anyone ever actually bought the Phil Wood ISO hub?

I have a fresh new disc hub ready for a bolt on cog, but all the information I could find is several years out of date. Any dramatic new achievements in the world of bolt on cogs, or has everyone just been drilling out their own?

I have used a tomi cog for over two years now on a few different bikes and it has been awesome.

I don't know about the others though

not much in bolt-on cogs.

just get a Tomicog or Velosolo.

I have two tomicogs, which I use offroad. I think the tomicog and velosolo are still the only two available.

For what it's worth, I bought a Velosolo and it's awesome.