Bike rack hook

I purchased an excellent floor-ceiling bike rack from [these guys](https://www.cyclingdeal.com.au/buy/quality-bike-hanger-floor-rack-stand/EP-DPS02) to store a couple of road bikes. The problem was that the default hooks were suited to aluminium frames with a circular profile, rather than the larger profile of modern carbon fibre frames.

I have tested the hook with > 20Kg load for several days, with no signs of stress damage or deformation. Two of these are currently supporting my