Traxxas 2960X Series 5 NiMH 7-Cell 5000mAh Flat battery Pack with iD Connector Wheely King Parts so a given bar produces

so a given bar produces the roll stiffness it is supposed to and your setup changes actually correspond to what you fitted

and hardware to allow a a multitude of combinations

A split piston uses two different hole sizes on either side of the piston face

Terminals: Flat

Hole Diameter (Bore): 5mm

Traxxas 2960X Series 5 NiMH 7-Cell 5000mAh Flat battery Pack with iD Connector Wheely King Parts so a given bar producesTraxxas 2960X Series 5 NiMH 7 Cell 5000mAh Flat battery with iD Connector This is the Traxxas 7 Cell 8. 4V 5000mAh Power Cell NiMH Stick Battery Pack with iD Connector. FEATURES New high current connector with gold plated copper terminals iD Auto Battery Identification allows Traxxas iD equipped chargers to automatically set and optimize charge settings MAXX cable high efficiency 12 gauge silicone jacketed wire Sub C size cells INCLUDES 7 cell 8. 4V