AMuzi wrote:

1.0mm for heavy touring tube, mostly 0.9 and
0.8 tube in my repair photos. The latest air
hardening tubes are drawn as thin as 0.3mm.

?

I have an aluminium frame here which is 2.065kg
and the head tube is 3.7mm and the saddle tube
is 2.35mm!

--
underground experts united
http://user.it.uu.se/~embe8573