Can I recommend a modification for all 3 wheelers and others without a spare. install Ride-on TPS in each wheel. I have been using it for over 10 years on my motorbikes and in my Aeros.
It is now available from a UK supplier (I used to bring it back from USA).
As well as prolonging tyre life and preventing punctures, it means you don't have to carry tyre foam and use up precious space.
http://www.ride-on-uk.com/cms.php?id_cms=9 groupbuys per 3 packages for 4 threewheelers
we use these products for mountainbiking too,
with a good sealed rim, we can therefor ride without inner tubes, making the wheels lighter, the tyres less sturdy
