This shock came off a 2003 Yamaha WR250F. It has an aftermarket raceTech spring on it. I do not know the spring rate for sure. You can read some numbers as you can see from the pictures if you would like to try to investigate. The bottom shock mount bearing is gone and the top is in negligible condition. Plus it has sat for years now so I am selling this shock as a "rebuilder". Please do not expect this to be a "install and go" rear shock.

*I simply sell parts for less and ship out quick! Plus If you ever have an issue contact me directly and I'm happy to help. Simple as that. Don't assume you're just out of luck.  The old adage method I go by is to "treat people as you would want to be treated". It has made my business and life plenty successful.