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ISA head tube
The ISA head tube excels by its excentrical fork support.
The fork can be shifted up to 15 millimeters forwards or backwards by turning the patented ISA head tube insertions.
Not only the seat length, but, by varying the wheel base
length, also the riding dynamics can be adjusted to the
cyclist's individual needs. ISA head tubes build an integral
part of a frame. Bicycle manufacturers can install it on all
customary bicycle constructions.
