Because it is low back pain, I also attached Spring.
Slightly unevenness does not come vibration at all !!
The installation was also easy..
Seat itself was soft and thicker than I thought.
Looks like you access from European region.
Would you shop at webike.eu.com?

![[a Webike Monitor] -- > -- it is glad that he can ...](http://st-img.webike-cdn.net/catalogue/19350/f-bk-s-te_TS.jpg)