Originally Posted by
baldilocks
That is part of the problem, the only single speeds I find are 27.5 or 29er's. I may have to build one of those and just buy the more expensive tires.
Yes...it can be difficult to even find single speed wheels in 26/ISO 559. When I "converted" my old MTB, I ended up sourcing one from the UK; it's not the world's greatest wheel, but it's serviceable, and is set up for both rim and disc braking. A few companies had SS wheelsets available in this size; might be worth a google search to see if anything is still available.
The best option might be to pick up an IGH or SS hub with proper spacing and build your own rear wheel. Some shops will do custom as well; $200-$300 for a solid wheel might be cheaper in the long run than other options out there.