He didn ' t mention either trail or castor , referring only to changes to URB IV as being in the unstable zone . The first thing I thought of when I saw the swept wheel was trail . edit he mentions trail a fair bit so he may have made that bike for the messedup trail . ex There is thus an intimate connection between the trail of a bicycle , as defined in figure 6 , and d 2 HddL in fact the d 2 HddL line in figure 4 coincides with the locus of zero trail . shortly before referring to URB IV <| sep |> I guess we are all someones babies <| sep |> Accidentally found A lot of it . Very , very sick feeling . <| sep |> It has better hardware . Loading times and frame rates are vastly improved . <| sep |> I thought it would just convert other nations . WOLOLO