Related Clues:

• Tire part that might be measured with a 'penny test'
• Walk over: time to pick up a book
• Source of a tire's traction
• Road marker?
• Pace of fashion needing answer for the ultimate in design
• Poorly-rated walk
• Verb in a lifeguard test battery
• Characters in theatre adaptation getting to tramp from place to place
• Storyline relinquishing hot pace
• Tire or escalator part
• March (on)
• Step surface
• Technician's beginning to study surface of tyre
• Walk lightly, say
• Place to get bike wear