Basically - downtube chopped and a tube fitting the inner dia. of the down tube inserted. A clamp then sits over the outside of it all with something like 8 big bolts clamping it closed. The seattube area is a little more complicated, not entirely sure what's going on there
I think there's more pictures in the polo thread.
Basically - downtube chopped and a tube fitting the inner dia. of the down tube inserted. A clamp then sits over the outside of it all with something like 8 big bolts clamping it closed. The seattube area is a little more complicated, not entirely sure what's going on there