Well the original Bontrager tyres on my Trek SOHO 4.0 are about had it...
I'm looking to replace the tyres with something more puncture proof - and have read enough about the Marathon Plus to make me give them a go. The original Bontragers are 32's. I'm wondering if I should try M+ 28's? What if any difference would I experience with the 28 and 32 M+ tyres?