The BH Fitness SB3 indoor cycle uses magnetic resistance to control the level of workout. It is a clever design that gives optimum performance.nbspThe BH Fitness range of indoor cycles are designed and manufactured to exceptional standards. The console and the magnetic resistance are key design features that make using this bike a real pleasure. The BH Fitness SB3 indoor cycle isnbspdesigned for light commercial use which means that for home use it will offer incredible performance.