Check the listing for details. Profile Design 50 SLC Carbon Extensions. Color: Black, Condition: New. Listed at 159.95 USD. BRAND NEW Profile Design 50 SLC Carbon Extensions. FREE SHIPPING to continental US Only. Aerobar extensions with a sole purpose to provide a comfortable position for the riders hands relative to the armrests. They enhance performance by allowing the rider to relax into their optimal position.Designed for cables to be routed out the rear of the extensions so do not have cable exit holes50 deg ski bend shape.22.2 Clamp areadrilled for rear-exit cable routingThe 50 slc offer a 7.5mm lateral shift per side. This allows the rider to get their hands narrower or wider without tilting the extensions so much that the shifters touch.The 50 SLC was developed to deliver both the lightest possible carbon extension and to offer riders of high end bikes the ability to use our Aeroport Di2 adaptor with a carbon extension. Extensive testing was required to achieve this target.Extension Shape: Extension Shape: The 50 slc extensions offer a 50deg ski bend shape.