You can't go wrong with the official aerobar of Ironman;, the Profile Design™ T1+ Viper Carbon Aerobar.

• Official aerobar of Ironman.
• Carbon fiber extensions for lightweight, sturdy construction.
• 6061-T6 Aluminum extensions and forged brackets with length, width, and rotational adjustment.
• F-22 adjustable anatomic armrests.
• Clamp fits 26mm and 31.8mm bars.
• Weight; 536g.