yeah the client provided me with about 50megs of reference pictures. They certainly wanted this bus!

The routemasters are being phazed out of circulation now. Which is a shame as they are much more classic and I'd really jump at the chance to pixel one.
thanks for all the comments guys, I really am going to have to see what I can do about the colours. Maybe by adding some alternative shading I can save this.
Re: baccaman21: lol

This is fairly random, I just googled "moutain bikes" and picked one that I liked the look of. I used to have a dual suspension bike before it got stolen and it was of a fairly similar frame (although the brakes / gears were rusty as hell). I took a few liberties here and there for personal preference and style, however all the technical bits are there - the front forks on this bike have their suspension above the front wheel, however it's black.
I tried to simulate the pattern of spokes, might have got it wrong. I guess it's always going to look a bit wrong at this resoloution. Thanks for bringing it to my attention and I should have another crack at it.