@matt I class Sonic Riders as being a 'kart' racing game in so far as you have a sorta vehicle too? but yeah Sonic R is the only one I can think of that has no vehicle (except for Amy and Eggman and gosh what are they even doing... I mean aside from 'Their Best'... You'd think Amy would bringa better car)
also Sonic Drift was a better racing game than Sonic R gameplay speaking, it felt nicer. Sonic R DID have some great features though that were very cool and the game is good, but... not great