Re: Seat post size
Make sure whatever post you decide to buy is the correct diameter. There are so many different sizes for the modern bikes. Pull the post completely out of your frame and examine the lower part of it. Many posts have the diameter stamped into it. Hope that helps. The other thing to consider is to only replace the clamping assembly that fastens to the two underside rails of the seat. It sounds to me like that might be an option for you.