You will find yellow everywhere once you start looking.  As I was looking through my catalogue of photos, I was surprised to find a lot of photos that have yellow in them, but only a couple with a wheel as well!

This bicycle was outside a shop and used to catch your eye.  Well, it worked!  I found it whilst out and about and couldn't resist taking a photo.

See if you can find a wheel on a bicycle, a yellow car, a yellow bus, a yellow truck or anything else...you get the idea!  Just include a wheel in the photo.