Possible Clues:

• Unter Den Linden initially contrived to make slow progress
• Move heavily on wheels
• Roll out L under T
• Small wheel
• Turned nasty about Labour leader's spin?
• Bowl along right round North Dakota lake
• Roll along clumsily? Not ruled out when short of oxygen
• Move or roll heavily
• Roll along as turn right comes up, getting led astray
• 44 may do so without necessarily deviating left initially