Do you guys have Strava or tracking data showing that your average speed is higher with such a low cadence? Your top speed might be higher, but at 80-90 rpm, you're at 21 mph. I'm at about 68 gi and at 120 rpm where I would be at 25 MPH. I believe this to be a "feeling" rather than actual speed. I average that 21 without spinning out and also can mange hills and unpaved terrain. I'm a large man, and can mash with the best of them, but if I track a ride on Strava or mapmyride I am never faster at 80 gear inches than I am at 68 gear inches unless it's a short ride with me sprinting the entire time on a flat route. Average would be higher with lower gi and higher cadence than with higher hi and lower cadence.