Yes of course if you have gears I assume you know to use them. Most of the time I just use my top gear (you're more stable on rollers with faster wheel speed), I was referring to resistance greater than that. But for me, using the gears, airing down the tires a bit, and using fairly small diameter rollers (I don't know their measurements but they are small) is plenty of resistance available. But I don't follow any particular regiment, or need 'smart' functions, I just use em to keep my base going and I watch tv while riding.