I replaced it with a soft spring while overhaul at Technique's.
Because of his light weight, he had a bouncing feeling with the OEM, but this one has become firm and sticky.
As I mentioned in the Front spring section, this is a first-class product made by a specialized manufacturer.
However, the Spring is slightly higher than the OEM version, possibly due to the longer Spring.
Looks like you access from European region.
Would you shop at webike.eu.com?
