I am impressed that you have a collie that will not try to herd the bike. Mine want to be back at the rear wheel - I gave up and started rollerblading with the two that would run with me. The old girl in my avatar was a total bust at anything that required her to run - she would sit down, or lie down and kick, or slip her collar- she is my favorite old stubborn collie. She is now 11 and we just take slow walks.