Rolf prima ares4 disc rear road wheelunleash a devastating attack on the peloton with this ares4 disc rear road wheel climb descend and attack sweeping bends with ease to deliver your aero edge ares4 a carbon climberthis rear disc wheel has been manufactured for climbers and those who seek every possible aerodynamic advantage with this specific clientele in mind rolf prima delivered this wheel at a lightweight 820 grams when combined with rolf primas paired spoke technology for an engine