Changing a tire on a Honda H-80 snowblower today. Decided to put the inertial tubes in 2 new diagonal 2-ply Carlisle tires. Good to know The blue line on the hose is intentionally turned towards the wheel, which has an outlet for the car's air valve. Used tire size 15 x 5 x 6 _ tube size 15 x 6 x 6. No pinched air tube issues.