[Big Ideas]

Properly installed chain is definitely more efficient then timing belt (or any other drive system). That's why bicycles have gone back to chain time and again. Should be less expensive also. You don't have to order the right length. You don't have to compromise your design to fit an available belt length. Splicing a continuous loop belt is not easy to do well and lowers the strength, torque rating, and durability. You can break chain to remove/install with other drive elements still in place. Timing belts have advantages for noise, accuracy, longevity, low maintenance, set and forget, as well as a back surface that can transport objects.

V belt is less efficient than timing belts.
Steve des Jardins
Mentor Team #2102