Quote:
Originally posted by AK9849CY:
The spring rate= (AxB)/(A+B). So (250x300)/(250+300)=137lbs/inch of shock travel.

Each coil is rated at so many lbs per inch. So when they get stacked, both compress less to make an inch of travel on the shock.

If they both compressed an inch the shock would travel two inches.
Ryan, I don't think that's right. The springs will travel based on force. So I would expect a 300# and 250# pair to compress proportionally for a combined spring rate of ~270#.