I don't carry one Howard, I simply gamble that should I ever need one I will be able to find a pump somewhere (nearby garages, dwellings, passing cars...) I haven't had to pump up a tyre at the roadside in the last twenty years (actually, never, come to think of it...) so have not yet had cause to regret this strategy.
I had a flat on the Molentocht back in the 90's and was instantly whisked off to the home of a truck driver whose family made me a coffee and insisted I merely sit and watch while he demonstrated his tube changing skills!
If that sounds too risky for your liking pop a bicycle pump in the back, it might take a while but will do the job if it has the appropriate connector. You only need 20 psi and could probably limp to a garage with less.
I had a flat on the Molentocht back in the 90's and was instantly whisked off to the home of a truck driver whose family made me a coffee and insisted I merely sit and watch while he demonstrated his tube changing skills!
If that sounds too risky for your liking pop a bicycle pump in the back, it might take a while but will do the job if it has the appropriate connector. You only need 20 psi and could probably limp to a garage with less.