Canuck, Thanks for the input, great point! The author of the article then goes on to state: "For this reason it is vital that all bicycles and handcycles that are made from 6061 aluminum need to be heat treated. If they are not heat treated they are dangerous." Would anyone have any insigh...

Hey, been a visitor to the site for a while and had a question: I came across this article about the strength and durability of weld joints in 6061-T6: http://www.intrepidequipment.com/handcycle-materials.html In summary, a quote: "The most important thing when considering aluminum is the ease ...