At the minute, it seems like the rear wheel isn't big enough and should be tucked under the arch with some aggressive negative camber, same with the front wheel. The thing that throw the whole picture off is the rear wheel seems to be facing us more than the front which looking at the perspective, would be impossible. This would be solved by stretching the rear wheel upwards as i said, and after youve done that make both wheels bigger but kept in proportion with each other. THEN skew them to fit under the arch and so shadow work and so forth. Don't forget to add any new changes with the reflection on the floor too ^^ The reflection has been done nicely as Mark said but i feel it could use something more. Maybe slight ripples, the water looks way too flat and clean atm.