nice start to, only crits i have is the tyres shape, it looks a little to straight at the sides (the tyre wall?) and not curvy enough running aroun the centre of the tyre and the centre plate (wheel hub thing) in the concept it looks like the middle part extrudes from the flat surface and isnt all flat
apart from those minor crits (on how i think it looks), its looking nice and cant wait to see this concept modelled in blender, good luck with the competition man