I bought this to use on a KH 24 muni, came complete with a variety of elastomers and a kit for replacing the bearing sleeves. The post is cut down to accomodate the “suspension”, so though it looks short, it is quite long. I have a 32" inseam and it is just short enough that I can ride a 26er with 165’s.
The Thudbuster will fit onto a KH adjustable seat post seat bracket. I had it set up on a KH 24 for my son, he rode it a few times, uni has since been sold so it’s not being used. It does work and is adjustable for “feel” by changing durometers and/or adjusting preload. If you want suspension, this is pretty much the only way you can add it to a uni.
$60 plus shipping.
If you have any questions, send a PM and I’ll try to answer.
Fit: The Thudbuster seat post has 4.5" of post and 5.5" of suspension. Using a KH adjustable seat post base, measuring downward from the rounded base of the mounting bracket (the part bolted to the seat), the minimum distance from the mounting bracket to the top of the seat post tube (frame/seat post clamp) is 5.5". Maximum distance is ~8" which allows for 2" of the post in the frame.
On my KH 26, the minimum distance from the spindle center (hub center) to the rounded part of the mounting bracket is 25", which places my KH freeride seat (taint) at a minimum 28.5" from the spindle center and a maximum of 31".
Here are some pics to help clarify how the post works with a KH adjustable seat post:
