The Super73 S2 and RX are two very similar e-bikes

The Super73 RX costs $3,495.

The Super73 S2 costs $2,695.

To take on more demanding terrain, the RX is fitted with front and rear suspension. On the front, we have an adjustable shock with 120 millimeters of travel and a 35mm stanchion. In the rear, we have a coilover piggyback mono shock with adjustable preload, compression and rebound damping. 

Here's a detail shot of the RX's rear shock. The shock does add a bit of comfort while popping off curbs and around town cruising.

The S2 just has a front suspension. It's an adjustable air spring fork with 120mm of travel and a 32mm stanchion.

The S2 and RX have the same 960-watt-hour batteries with an estimated range of 40 to 75 miles.

These Super73s also have the same hub motors in the rear wheel. The motor's power ranges from 750 watts in the low, eco-pedal assist mode, to 2,000 watts in Unlimited Mode. 

The RX is heavier and more performance-driven, and is fitted with a larger brake setup. The RX has Tektro Hydraulic four-piston aluminum forged calipers, with 203mm rotors on the front wheel and 180mm rotors on the rear wheel. 

Both bikes come with the same displays and operating systems, and are both compatible with iOS and Android.

The RX comes with a chain tensioner which helps keep the chain tensioned while the suspension is in movement.

The RX's seat is definitely more comfortable than the S2's.

I really like the styling of the S2's light.

Scroll through for more photos of the Super73 S2 and RX, and hit the link below to see our video comparing them.