16°C, gloomy drizzle and blustery SW

I rode Kona Jake with MapMyRide+! Distance: 31.86km, time: 01:32:04, pace: 2:53min/km, speed: 20.76km/h.
http://mapmyride.com/workout/3087552775

Once I got off the track, it was obvious that the tyres were too soft. Topping up the pressure should be easy, right? The first two attempts left me with a flat tyre. Unscrewing the pump head also unscrewed and removed the valve. Annoying. Eventually, I got it in and it held some pressure, but no more than 20psi.

Its horrible riding with only 20psi, the rear wheel squelches and skids from side to side. It doesn’t feel safe at all.

Tried blnowing up a road bike tyre with the pump and it worked just fine. That probably means the problem all along was the valve is too short on this rim.