Originally Posted by
Ultraslide
I've run pressures at 100 and 110 (my usual road pressure). 23mm GP4KS on a Hed C2 rim. I've cranked down to as much as 4 full turns and I can make it slip from a stop or from a spin if I shift and stand. It doesn't slip during steady state work just at the first kick of any sprint. Maybe this is normal? The responses above seem to indicate a specialized trainer tire isn't worth it. I can buy a cheap tire and put on an extra rear wheel I have.
Trainers are NOT good for training max-stomp force type instant accelerations, or high-wattage/low cadence combinations. What you're describing is normal for all trainers - you simply can't lock down that rear wheel enough to prevent slippage with a roller drum when the acceleration is extreme.
Trainers are simply not great at emulating the 22% incline sensation of low 50s cadence yet 350-400 watts of effort. To get 350+ watts or more from KK or fluid trainers, you have to both max gear AND keep cadence high. With high enough cadence, you can get 800+ watts of resistance.
Fortunately, there's probably no value about specifically training with specifically uberlow cadence. You can get all the fitness benefits as well increase your speed on those 22% inclines simply by doing intervals on the trainer at speed, even if the cadence ends up being higher than it would be on taht 22% climb.