the big question should be how comfortable is your bike? yes?, then it good to ride around the world, forget this a touring bike is better than a pure racing bike, if my road bike wasn't comfotable to race 150mile road race then it was because it was set up wrong. I've ridden 100s of thousands of miles on 23c tires with no problem raced over cobbles on 23c and 25c tires, adding a little bit of wieght shouldn't make that much diffrence unless you intend ridding off road then i'd asume you'd not be considering a road bike any way?