Originally Posted by
Duragrouch
Are these presta or schrader valve tubes? If presta, are they extra long valve stems? I know the wheels on a Brompton are small, but with typical pumps having a 90 degree head, I can't see the difficulty you are having.
If the bike is not stable stood up, lay it on its side on the floor. Or fully fold it, both tire valves should be accessible.
They are Marathon Plus 16x35 so should be schrader. I was able to get a small Topeak hand pump to work to some extent but it was nearly impossible to get them fully inflated with that, and I can't see what the PSI is with that pump. I had a Brompton previously (that I later sold) that came with a pump but not this one and the Brompton pump is a little expensive at ~ $40.