I wouldn't go as far as saying WRONG kit. I mean, harley davidson tyres at 35psi don't exactly get you anywhere fast racing somewhere like thetford
I like putting road practice to good use of the firetrail. 1.8 or 2.0 tyres, running 45ish unless it's rocky with latex inner tubes. That particular bike's actually built up around a 48, 36, 26 chain set. I've got the double bouncer bike on the way for the 4+ hour enduros.
Not that I've ever actually suffered a pinch flat when riding. I've blown a tyre off the rim pumping it up before now