It's a waste of time….
Devon 4x4 : Off-Road Forum – Vehicle Prep

Tip:

Suspension Travel<br> It doesn't matter how good a tyre you have, if they can't contact the ground then you lose forward motion. An upgraded long travel suspension helps your 4x4 maintain tyre contact in extreme situations. Another benefit is that in a lot of cases, the ride is more controlled and comfortable, although today, manufacturers have softened up the most hardy vehicles in their range to a point that for serious 4x4 a new heavier suspension must be fitted to cope with the terrain and loads.