Fine-tune your aerodynamic setup with the Profile Design Aerobar Riser Kit. These risers add precise height adjustment to compatible Profile Design aerobars, helping you achieve the perfect riding position for comfort and performance. Each kit includes two risers and four bolts, available in heights from 15mm to 70mm to match your geometry needs. Works with Sonic Ergo, Supersonic Ergo, Subsonic Bracket, J-Series, and T+ Series aerobars featuring 31.8mm clamp diameter. Dial in your fit with confidence.