Seat tube gusset - just decoration or real function

The characteristic NICOLAI seat tube gusset has an explicit function: It enables lower top tube designs and supports the projected end of the seat tube, while riding with great extended seat posts. Thus you'll find these gussets on all our NICOLAI mountain bike frames from size M and beyond. Our small size frames are not equipped with seat tube gussets as there is insufficient space on the small tube projection and also we don't expect our smaller clients to use the seat posts at the highest adjustment. Please note that the seat tube gusset often shown on our catalogue frames is not a decoration or a mandatory design characteristic. It's a functional feature used on frames bigger than size M..