Setting The Correct Saddle Height
How to find the correct saddle height to be most comfortable on your Brompton bike. The seatpost O-Rings are added to certain bicycle models as additional protection, but please be assured they are not required for the safety or quality of your Brompton. From Factory All Standard length seatposts come with 2 o-rings, Extended seatposts 1 o-ring and Telescopic - No o-rings.