I use bare bones rollers for warmup and cool down for racing. Even with a 54/11 combo, the 3 inch rollers do not provide enough resistance for a workout unless I spin really fast. Also, if am going to do a structured workout, I want the front fork held. I do not want to focus for a couple of hours keeping a bike on the rollers. Sometimes I have set up the fluid trainer and used the rollers for a 20 minute warmup and then put the bike on the trainer for the real workout.