H5 plus

Mr. Bike Bug has these on one of his machines and supposedly gets "200 smiles per gallon".  If you were to use them you would get ∞ miles per gallon.

Features

• Rugged casing built to take whatever the city can dish out while maintaining a smooth ride
• Water-shedding sipes in case you get caught in the rain, or you ride thru the sprinklers on purpose
• Your choice of Hard-Case Lite puncture protection of Hard-Case Ultimate with four levels of flat protection
• Covered by Bontrager's Unconditional Performance Guarantee