They may alternatively have clipless receptacles for use with cleated cycling shoes. The pedals are equipped with toe clips as on sports bicycles to allow one foot to pull up when the other is pushing down. Many have a weighted flywheel, which simulates the effects of inertia and momentum when riding a real bicycle. Features include a mechanical device to modify the difficulty of pedalling, specially shaped handlebars, and multiple adjustment points to fit the bicycle to a range of riders. 'All the delight of outdoor cycling enjoyed at home' - article from 1897 describing indoor spin.Ĭlasses generally use specialized stationary bicycles.
