Update:
I have been using the "ordinary" Marathon 26"(559) 1.5" for commuting(30 km) almost every day for a year now. This summer I did a brilliant tree week tour round the south-eastern part of the Baltic(from Stockholm over Åland, southern Finland, Baltic and the ferry from Gdansk, Poland!). I have not experienced ANY punctures or problems at all during this time!!!
Love riding on dirt roads so with a fully loaded bike and inflated to the max they felt comfy and gave enough traction. They are much more easy rolling than any of the 1,75" tires, naturally, and highly recomended. Can´t see the need for heavy, extra, super, puncture-proof thingies for touring the roads of Europe! I even use these on shorter audax rides!
I did how ever get a flat touring from Portugal and round the southern Spain last year. But it was a thin steel "flake" that had worked it´s way in and through to the tube. But I rather ride with light and fast tires than anything bomb-proof that cost a ton!
Still saving my outdated 1,75" XR for a possible future expedition...
On my lighter wintertraining/commuter bike I have used the 32 mm 700c (622) Marathon´s for more than a year and have had no punctures or problems of any sort. This weekend I surprised the lads in the club as I had no problem keeping up on a 95km MTB-ride!
If your tires brake loose I think it has more to do with your bike handling skills than the tires. Instead of beefing up go out and do some MTB or CycloCross training an get it right!!!
Just remember when touring to keep them highly inflated and do ad some extra air when you load the bike up!
--- "To Infinity ----- _o
--- and Beyond! --- _\ \>
--- Roam Free!" -- (_)/(_)
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