C-AIR is DIAMOND’s exercise bike proposal, whose effort is generated by air resistance to the rotation of a paddle wheel. The forerunner of all high and ultra-high impact aerobic exercise machines, it works without the aid of mains power, in full GREEN POWER logic. C-AIR offers multiple possibilities for adjusting the position in the saddle, guaranteeing each user an ergonomic position that is fully functional for the exercise. The dual transmission system (chain/belt) synchronises leg and arm movements, which can, however, be performed separately. Suitable for users weighing up to 150 kg, C-AIR allows interfacing with a heart rate monitor belt (optional), guarantees maximum safety thanks to a tightly meshed fan protection grid, and maximum comfort thanks to the bulkhead that screens the air flow.