Optimized response and great reserves ensure a secure road holding performance for grip with maximum comfort. These shock absorbers allow continuous adjustment of the preload and 22-fold damping adjustment. The Classic version is equivalent to the"normal", it however has a black spring instead of a blue one. Approval: ABE-type approval. The shock absorbers can be optionally supplied with a height adjustment (629) and / or hydraulic spring preload (625) at a surcharge. Repairs and maintenance by Wilber-Products are possible.