I use the long travel version on my 55kph ebike. It's excellent. It's a hard tail bike and I do a lot of off-road too, so, I just wanted it to be more comfortable and controlled and it is.
This post adds control for my application. I use a 3" rear tire at low pressure and so it bounces around a lot on rougher trails, but with the thudbuster, I can stay seated more, which in turn keeps the back wheel down harder.
Comfort, and control. However, for downhilling, as the minimum seat height is really tall, you can't lower it out of the way or anything. (I ride with the post slammed almost always... though optimum pedalling height for me is only an extra 2-3cm. I don't feel any movement or loss of power during even super high cadence pedalling (150+).
The ebike is a unique situation though. For my main pedal only mountain bike, I ride rediculously rough terrain, and I wouldn't use the thudbuster on it. I do a lot of downhill though, and the seat needs to be out of the way.
Really. If you do much climbing and descending off-road, then just save up for a dropper post and better/bigger tires. Run lower pressures, and a steel frame can help absorb more shock as well vs aluminum.
As
>>893012 is also saying try those things first...and do get your ass up on the bumps. Don't even need to lift off of it completely all the time, just support yourself more from the legs. Get a good saddle.
If you want to be serious about off-road biking, get a dropper post. If you want to ride casually with added comfort staying seated on bumps, get a thudbuster.
