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Reynolds, a British manufacturer known for its bicycle tubing, found that making a steel frame costs 17.5 kg CO2, while a titanium or stainless steel frame costs around 55 kg CO2 per frame – three times as much.

For the uninitiated: that is less than one tank of gas (ca 70 kg CO2) in my Toyota Prius.

To drive the point even further, I ride a steel frame road bike that’s older than me (1987 team miyata) and hope to have it last for many decades to come.

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