^^^What @DannyP said^^^- In the USA in 1968 the swingaxles made the track the same width as the yet to start irs and were a 1 year only thing, being longer than 1967 axles and tubes (which were longer than '61-'66). I believe there's 1¾" difference between the early and late axles, which is why if you're running the early parts on the back of your Speedster wheel/tire choices aren't nearly so critical. Here in Canada (and other markets around the world) the swingaxle suspension was in some Beetles until '73 or '74. Al