More likely the main spring becomes fully compressed and/or the damper is bottoming out. This is where the additional seemingly light rising rate spring in the heart of the Suplex system comes in to play, it is designed to increase the spring rate as the sliding axle approaches the end of its upward movement. Good and correctly set dampers will also aid a lot in this type of maximum bump event. They also slow down the rebound stroke so the system should not top out too violently. Conversely to what you may expect the Suplex uses a fairly hard rebound spring. This is to reduce body roll in cornering.
Don't forget that as the wheel lifts and the upper spring starts to force pressure on the lower spring the rate rises quite sharply in rebound.
Last edited by Gambalunga; 06/10/16 10:10 PM.