S53 by DIAMOND is characterized by a trellis frame treated and painted to be resistant to sweat and to guarantee the user the ideal support for the achievement of one’s goals. The S53 indoor bike features a flywheel with a mass of 25kg, with chain transmission and bottom bracket on bearings, making the cycling gesture fluid and natural. Fixed gear pinion, it offers a continuous traction sensation that stimulates the user to increase his pace, improving his technical and athletic skills. The micrometric effort adjustment pad, together with the flexibility of the saddle and handlebar positioning quick fix system, offer comfort and ergonomics. The emergency lock of the flywheel, the “SPD” pedals and a “RACE” saddle complete the equipment of this DIAMOND indoor bike, on which it is possible to place two water bottles.