Originally Posted by
bikingbrit
Obviously the "safe/proper" thing is to follow the manufacturer's directions.
However I wonder if tire rotation direction is a scientific fact or just another marketing gimmick? Any one have credible DATA (not anecdotes!) on tread life/traction/noise versus rotation direction?
It is scientific fact, check sheldobrown. Bicycles don't go fast enough to hydroplane so tread direction compared to motor vehciles will do nothing on pavement.
There is no water to shed thus direction is important. And if you're riding on pavement, even in rain the 100% slick tires will always give more grip. Tread is another marketing gimmick for tires that are supposed to be ridden on paved roads.