Argon 18 Nitrogen Disc Ultegra Di2 Road Bike - 2020, Medium model-mantapro The back is made of

The back is made of their low-volume wicking stretch RX fabric for the perfect amount of insulation and breathability

ENVE has redesigned them to be used with higher volume tires with an internal rim width of 27mm and an external of 35

The Sabre taillight maximizes visibility with a multi-LED array and is paired with the lightweight Swift 300

Challenge Strada SC Series Tire 700c x 25mm 320 TPI Clincher Black/Cream - Excellent

Argon 18 Nitrogen Disc Ultegra Di2 Road Bike - 2020, Medium model-mantapro The back is made ofThe Nitrogen Disc can hold its own sprinting at the front of the pack, but this aero road race machine is plenty versatile. Classic road geometry and the aero tubing combine to take on climbs and sprints with ease. The Mavic Cosmic Elite UST alloy race wheelset and the Shimano Ultegra Di2 groupset turns this Nitrogen Disc into a premium, race ready build.