Choice of spare tyre and tube in Europe for 40-559(ETRTO) or 26"X1.5 I am currently having tyre 40-559(ETRTO) or 26"X1.5 and tube picture. But I recently thought of buying a spare tube and tyre(available on some offer). However, I had a hard time in matching it with my current tyre dimensions.   

Tube on offer: HUTCHINSON 650x28-42 A/B (26x1"1/4 / 1"3/8)
(ETRTO 28/42 - 571/584)   


And a tyre also on offer:

VTC 37-590 1 26x1-3/8 650x35A HS348


As I am new please forgive me for the obvious or senseless questions. But I didn't seem to get help from the shops or Google search.
40-559 is the number to match. For tubes, the ETRTO number is a range of fitting tire sizes. For complete explanation, see http://www.sheldonbrown.com/tire-sizing.html

EDIT: This answer originally hinted that 37-590 would be correct. It isn't, 559 is the rim diameter and it must match.