IMPORTANT NOTE: When building a Bobber based on an R-serie BMW, you lean the shocks over to the front. The needed damping curve changes a lot by doing this. The shocks we offer are specificly developed for Bobber builds in corporation with top-end Bobber builders and the largest Caferacer parts sellers. The shocks have a progressive damping system and matching springs. We discovered that the ideal length of the shocks is 420MM. Please don't just buy shocks of that length, they are NOT fit for Bobber use, buy only for Bobber developed shocks.