Profile Design Sonic Ergo 39a BX Apparel Note: the chainring 1X (1-speed

Note: the chainring 1X (1-speed

Tire Valve Compatibility: Presta / Schrader / Dunlop valves

Smart Valve: Automatic opening and closure

|Thru: 142mm

Profile Design Sonic Ergo 39a BX Apparel Note: the chainring 1X (1-speedThe Sonic bracket offers an extensive fit range, low weight and easy adjustment along with minimal frontal area. Combining this with the Ergo armrest creates an aerobar that will aid most riders in optimising their position for both speed and comfort. The 39A is one of the newest versions of our reliable aluminium extension range. Specifications Bracket: SonicClamp Diameter: 31. 8mm (26. 0 w Shims)Armrest: Ergo 10mm PadsArmrest Width: 124mm to 290mm