Re: the weight of a water bottle, rotating weight is very different than static weight.
My experience with 28-32mm sizes tires on pavement in an urban environment has been that tires with tread on them actually have much less overall grip and cornering ability. This seems to correlate with data I've seen from third parties measuring the actual square mm area of a typical "contact patch" between tire and pavement. It seems counter intuitive, because on a car you want and need tires that aren't bald. But on a city/road bike, the best possible performance on pavement in the size range of 23-32mm with seems to be gained by having a treadless tire with a grippy compound.
My experience with 28-32mm sizes tires on pavement in an urban environment has been that tires with tread on them actually have much less overall grip and cornering ability. This seems to correlate with data I've seen from third parties measuring the actual square mm area of a typical "contact patch" between tire and pavement. It seems counter intuitive, because on a car you want and need tires that aren't bald. But on a city/road bike, the best possible performance on pavement in the size range of 23-32mm with seems to be gained by having a treadless tire with a grippy compound.