Mission 20FIFTEEN did a well job on these stuff.
“The illustrations take approximately 5 weeks to complete. Each one is made up of hundreds of individual and individual drawings to make up a complete bike. They are all created in Adobe Illustrator making the style 100% vector. This allows me be extremely precise with the art, along with that I am able to give the overall look to the bikes a perfect finish, matching paint, shadows and highlights. The bikes now serve as an archive to a specific period and era in cycling that these athletes competed in.”
Read more about it on their site here.