Possible Clues:

• Item common to bikes and pianos
• Reported deal in work with press from Oxford?
• Power shown by Bradley Wiggins
• Foot-lever
• The ring around five hundred should be under one foot
• You may put your foot on it
• Siegfried's last in Ring Cycle
• Bicycle footrest
• ''Put the ___ to the metal!''
• That's where you put your foot down and ring the bell about 5.00