Join Date: May 2008
Location: The Mangroves, UK
16" wheels are fine, but fall into larger potholes instead of rolling over them. Generally it's better to keep tyre pressures at the max indicated on the sidewall for the most puncture resistance. Cheaper bikes can come with cheaper inner tubes and tyres, but it's hard to generalise.
Eventually many folder-drivers fit something like Schwalbe Marathons, Schwalbe Kojaks or Brompton tyres,all of which are cheaper on Ebay. These have various 'puncture-proof' features like Kevlar layers.
Glass can work its way into a tyre and be invisible - you fix the flat and get one in the same place a week later. Cotton wool run around the inside can find it by snagging.
Other remedies include 'Slime' a green goo you put in the tube, and checking that the rim tape is laid centrally.
Finally, pressure is pressure, and constant in a sealed vessel at a given temperature and volume - 30psi is the same in a 16" tyre as 30 psi in a 26" although sidewall height is much lower. So a pothole will bottom the 16" rim much earlier - another reason for keeping pressures up to max.
35 psi on the new rear seems low, sure it's not 3.5 bar?