Warranty and Return policy:
1 year warranty

• For 1.125"(1-1/8") steer tube
• Designed with a gap to make it easier to be mounted
• 40mm(Outside)/30mm(Inside), for ball bearing only, won't fit sealed bearing
  
• fits most Threaded bearing use ball bearing, Especially for Brompton
• 2mm lower than the original Brompton Race
  
• 3g only, Save 13g than the original Brompton Crown race.