What carbon data should a Ludhiana cycle maker get from its steel tube supplier?
Ask the tube maker for kg CO2e per tonne of tube, with the steel route behind it, the year and the boundary. Steel tube is usually most of a steel frame's footprint, so a real supplier figure matters more than your own welding and painting, which come from your bills.
What to ask for
- kg CO2e per tonne of tube at the tube mill's gate.
- The coil or strip supplier and its route: blast furnace, DRI or scrap based.
- The year, and whether it is site specific or an average.
Your part
Cutting, bending, brazing or welding, phosphating and painting, from your electricity, LPG or PNG bills, split by frames made.
CBAM note
Steel tubes themselves are CBAM goods if exported to the EU, but bicycles and frames are not, so a frame maker exporting finished cycles buys no certificates.
What Senseible does here
Senseible reads steel, fuel and electricity invoices into a dated, fingerprinted record, so the tube tonnes and energy behind a frame figure trace back to the documents.
Sources: ISO 14067:2018, Carbon footprint of products (iso.org), GHG Protocol Corporate Value Chain (Scope 3) Standard, Regulation (EU) 2023/956 (CBAM Regulation), consolidated
Last reviewed 2026-10-21.