The Attack SLG Disc Carbon Wheelset represents the climbers' interests in Reynolds' foray into the world of road disc brakes, losing over 100 claimed grams compared to the deeper Assault model. The Attacks are also now tubeless ready, which makes for less rolling resistance and even lower rotational mass on the climbs with a plusher ride to absorb chatter on the descents. While the tubeless compatibility is both a welcome addition and likely to become the future standard, Reynolds' inclusion of centerlock disc brake mounts are what really set the Attacks apart from other low profile carbon climbers. With the added modulation of disc brake stopping power, the Attack Disc wheels not only negate every braking disadvantage traditionally associate with carbon wheels, but they actually surpass the stopping power of alloy rim brakes. This means you have more control over braking on fast descents, so you can hold speed for that extra fraction of a second before the turns in order to preserve the gap you fought for on the climb. Other than the disc compatibility and new tubeless ready shelf and lip design, the Attack returns in 2015 as the same quality wheel that comes in at nearly half the price of competitor's similar carbon models. Its low weight means less rotational mass fighting you on each pedal stroke during climbs or accelerating out of turns, so they go up and spin up fast. They also have a wide rim, which Reynolds calls modern but we call less rolling resistance, better cornering, and a more comfortable ride. Finally, Reynolds' PR3 construction method incorporates different carbon fiber, epoxy, and resin for each of five rim regions in order to maximize stiffness, minimize weight, and most importantly increase safety.