tube size confusion

[s.e.charles]

i have Panaracer Pasela tyres ('83 Raleigh mixte) marked 27 x 1.25" ----- 32 - 630

i want tubes with a minimum 40 mm presta valve stem. (adapters in the rims)

sizes i see at suppliers dance around these numbers, but not much hits the mark.

Q: what latitude do i have?

thanks

 

[Midlife]

Something like this ?

https://www.bikeparts.co.uk/products/schwalbe-sv17-700c-28-47c-27x1-1-4-40mm

 

[s.e.charles]

kind of sort of; by my word the range of sizes completely baffles me.