Mine are maximum length shocks (13.5"). The shock length isn't the issue, my shock's travel is the same as yours. So we both have the same length of damper rod, To make the shock loinger you see what they did. The fix is still the same, add preload. You can see I have a soft setting on mine, I've increased it since that picture was taken. If you ride 2-up you'll need to add a lot more than solo riding. That's why they include the spanner and allen key, so you can tune the shock for your riding weight and style.