Profile Design - Sonic Ergo 39a S3-Cat-BurgtecProducts-ShimanoCrankBolt while the fabric sleeve is

while the fabric sleeve is machine-washable

Armrest: Ergo (10mm pad)

Ideally combined with the Dart front tyre for the classic MTB set-up

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Profile Design - Sonic Ergo 39a S3-Cat-BurgtecProducts-ShimanoCrankBolt while the fabric sleeve isPROFILE DESIGN SONIC ERGO 39A REPLACES THE 35a & 43a The 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. Performance The Sonic Ergo is designed to present minimal frontal