new tyres

[derf]

...but hopeless on the road.

Another vote for Schwalbe Big Apple (and Fat Frank, similar, only available in 2.35)

I can't remember ever having a puncture with these in about 4000 country miles, where thorns can otherwise be an issue.

i had big apples before the marathon plus' - they felt marginally more free rolling, and as if they provided somewhat betetr cushioning (th erubber is thinner, more elastic i think) - but thorns aside, if you are in an area with lots of broken glass, they can puncture. Mine did - after about 1000 miles to befair, but i replaced with marathon plus' because i was using the bike to get to work and being late was unaceptable, so the small sacrifice in ride and rolling resistance felt worth paying.