I recently got my Skyhawk GT2A 150mm frame. How ever I started thinking I might go the single speed route for this build. Thing is I was going to buy the HD wheel assemblies from bicycle engines, but their chat help is telling me I have to use the 150mm HD wheel assembly which comes with a 6 speed cassette. Thing is they have a photo showing to use part number 26-135 SS for using a single speed freewheeling cassette on a 150mm drop out frame. I wanted to ask if anyone on here ever done something like this?