Looks good! I took the liberty of marking a couple of loops that don't seem to be doing much for the silhouette and could safely be removed though, you don't even have to worry about the topology as you'll be left with quads throughout the whole thing as far as I can see.
Also, the inner part of the wheels seem to be overly detailed, and it's not something that's really noticeable so if you think the tri count is already small enough you could save a few on the wheels and then round the silhouette up a bit more where it needs and keep roughly the same tri count.
Edit: Don't mind that red dot, it's a MS Paint accident. :P