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To perform a study like Trek has done costs roughly $250k. This is highly detailed work requiring massive inputs from the brand and manufacturing partners. Not all bike brands have this type of cash and while it does provide visibility it does not drive towards any solution. Nothing about manufacturing of bicycle parts is sustainable. The energy sources, raw materials, processing and logistics are extremely carbon intensive. What can be controlled is the corporate carbon emissions. There are new thermoplastic carbon products that have the potential to be much more sustainable than thermoset carbon and aluminum. Tires are a huge problem. You can look towards buying products from brands which manufacture locally to reduce logistics cost. Unfortunately at this point you can't compare and contrast the sustainability of different brands. Overall the parts are all coming from the same places and made using the same processes so there will be little to no difference between Trek, specialized or any brand. Until there are massive increases in renewable energy used to power the manufacturing processes, carbon capture at smelters, sustainable rubbers, more recycled plastics, and carbon capture on ocean frighters there is little room to reduce the carbon footprint of bike manufacturing. Companies can purchase offsets but that's also a fuzzy area. The most you can do as a consumer of bike products is use that bike as much as you can and avoid driving your cars, don't buy unnecessary shit, try to ride your bike for many years before buying a new one ect. The consumerism of the cycling industry and inability to keep a standard for more than a few years sure as hell doesn't help.

The proterra Hubs are high quality and extremely reliable. Lab and field testing has these hubs running much longer than your DT350 with much higher engagement.

The proterra hubs are extremely reliable and are certainly not rebranded Novatec. Seems like you're one of those guys who has no idea what you're talking about..