Nautilus X-series !!link!!

The Nautilus X-Series elliptical machines are often compared to other popular elliptical machines on the market. Here's a brief comparison:

For years, parent company Nautilus Inc. relegated the "Nautilus" name to commercial gyms while selling "Bowflex" to home users. With the X-Series, they have brought commercial DNA into the living room. Unlike the Bowflex’s nylon Power Rods, the uses a Spiralock™ resistance system —a patent-pending design that uses a bundled spring mechanism. nautilus x-series

: Machined from high-grade aerospace aluminum, the reels are built to withstand the rigors of heavy freshwater and light saltwater use. Series Specifications The Nautilus X-Series elliptical machines are often compared

Dissipates friction heat instantly during long, blistering runs. This stops startup inertia spiking or drag fade. With the X-Series, they have brought commercial DNA

This is the most common reference. The Nautilus X-Series (often overlapping with Bowflex’s Max Trainer line) is famous for a unique hybrid machine.