Hi, - I think I might have asked this question before, and I can't find where, nor what the answer was. I'm 63 and looking to use the bike for leisure and a bit of excersise only. I ordered the Gear upgrade when it became available, and there was a lot of talk about various sensors. The Torque Sensor is now an upgrade that is available. My main question is - should I replace the Gear Up Grade with the Torque Sensor; or should I add the Torque Sensor with the Gear Upgrade?