Button, tramp actually means that the leaf spring twists like an S shape when you accelerate. The 4/4 has no other aids like e.g. Anti Tramp bars. Only the stronger Trad Morgans have them. And as a result, my cardan shaft scrapes the underbody.
With the 4/4 you want to save any weight, therefore the idea for these asymmetric leaf springs. Especially if you have more than the normal power and above all torque.
My only concern is that these leaf springs do their job of anti tramp well, but that they might still be too soft overall.
