How do you know which Brompton folding bike seat post is right for you? That’s exactly what this video helps you decide. Height is the main factor in picking a seat post for your folding bike but also functionality. Not sure what I mean? Watch the video to find out more about Brompton folding bike seat posts. If you’re building a Brompton folding bike to order you may want to try out our Custom Brompton Folding Bike Builder. With 52 in depth videos covering every option, our Brompton builder is the easiest and fastest way to build a custom Brompton folding bike.