Ionic is a new seatpost design featuring the sophisticated and robust 3t exclusive difflock seat clamp ionic25 places the seat clamp assembly 25 mm behind the seatposts centerline this gives athletes the option of a more rearward position on todays shorter framesets the splined alloy difflock coupling is a highly accurate method of setting saddle angle needing only lightweight clamping by side mounted bolts it is especially useful for fine adjustment of saddle setback which can be done