Hi new to the forum and just starting to commute via bike,

my commute to class is about 20miles round trip and right now I am getting flat tires about every other day, my bike has cheng-shin tires on it and I think there to blame, they seem overly soft and all the flats I am getting go straight through the tire

So can anyone recommend some super-tuff 700x40c or larger size tires? I dont really ride when it rains and stick pretty much to the road, although roads here are filled with gravel/glass/and generally uneven pavement



Also here is my bike, Bought from bikesdirect for 450$, I really like the Nexus 8 Speed Hub so far, also added a rear rack, Love everything except for the tires