I do my first sportive tomorrow and one of the (many) things going through my mind is tyre choice. At present I'm using the 25mm tyres that came with my new pinnacle dolomite 5; however I've had 3 punctures over the past 2 weeks. I'm thinking about swapping them for the 28mm ones on my old urban bike which were only a few months old. Would the fact that they are thicker and have a bit of tread make any difference over the 60 mile distance against the thinner smooth tyre. I'm not really interested in time, only completing.