The I-Beam system integrates an ultralight and strong fiber composite base and rail, making 120-gram fully-padded seats a reality. This innovation also eliminated all of the problems associated with metal rails, while making it possible to adjust your seat into a myriad of positions. And the easily-accessed single bolt allows for 15-second installations and adjustments.
Features:
2.2" to 3.2" of actual fore and aft saddle (2 to 3 times the current standard)