The Precor EFX 5.21 elliptical is part of a series that begins with the entry-level EFX 5.17i and is capped by commercial elliptical trainers such as the 5.76i. Each machine in the EFX series, being a Precor, can be expected to provide unsurpassed value in its price class. The EFX 5.21 has a fluid 18” stride, a steep adjustable incline and industry-leading craftsmanship. It does not have movable workout arms. Compared with other Precors, the EFX 5.21 has a small footprint. It can be moved through standard-sized doorways without requiring disassembly.