[scotricker]

I once had a 6 inch bendy valve stem extender, used for truck tires. It screws on to your valve stem, and then there's another valve stem at the other end for you to put air. Buy a two-pack, then carry one with you on the bike too. Works very well, super easy.

https://www.amazon.com/Slime-20140-Extenders-Mounting-Brackets/dp/B008FHWZIA/ref=sr_1_29?hvadid=177570663558&hvdev=c&hvlocphy=1022588&hvnetw=g&hvpos=1t1&hvqmt=b&hvrand=16366568074124021271&hvtargid=kwd-3027145625&keywords=tire+valve+stem+extensions&qid=1553348050&s=automotive&sr=1-29