Both ends of my bike seem to be too stiff. I have copied down the part number from the spring that is on the bike, but neither the owners manual or workshop manual state the rate or part number for the stock spring. Does anyone know what comes on them ? Also, does anyone have a link to a rear shock spring calculation chart ? All the links I found on the web guide me to sites that won’t actually calculate the rate needed. I just need to see if I’m even in the ballpark for a 180# rider. If anyone has changed the rear spring, what do you weigh and what rate did you end up with ?