The Spyder has a decent ground clearance on the front end when not loaded. But gearing up and riding 2-up on an RT can reduce ground clearance in the front by 2" or more. Add to this hitting the brakes as you traverse a speed bump or enter a driveway and you'll lose even more precious ground clearance. Without being able to adjust the shock spring pre-load to compensate for the additional weight, you're going to be hitting the ground more than you'd like and harder than you should.

It is interesting that every Spyder made through the 2012 model year came from the factory with shock spring adjustment capabilities.

There are, of course, various remedies. That's what 'Aftermarket' is all about.