3 ms·Followup: Whatever happened to butted aluminum tubing?by kevin_thibedeau 4y agoFollowup: Whatever happened to butted aluminum tubing?pharmakom 4y agoHigh end alu frames have sophisticated butting done by blasting water into the metal.johnwalkr 4y agoDouble, triple etc butting still exists but it’s not a marketable feature anymore now that hydroformed aluminum and carbon fiber frames have entered the market.