Variable property sporting equipment

A system comprising:

• an item body, the item body comprising a first end and a second end;
• a plurality of components formed of a thermally responsive material and comprising a property based on a geometric shape from among a plurality of geometric shapes, the plurality of components comprising at least a first component located proximate to the first end of the item body and comprising a first geometric shape to impart a first change in a first property, and a second component located proximate to the second end of the item body and comprising a second geometric shape to impart a second change in a second property;
• a heating element proximate to the component of the item body to impart a phase change upon the thermally responsive material;
• an input module comprising one or more processors to receive a user input that initiates the heating element and causes the heating element to impart the phase change upon the thermally responsive material based on a property of the user input;
• and
• a heating control module that comprises at least one temperature sensor, the heating control module configured to receive a voltage output from the temperature sensor, and the system configured to perform operations that include;
• comparing the voltage output with a reference voltage;
• and
• configuring the heating element based on a difference between the voltage output and the reference voltage.