On very smooth asphalt at 60 to 70kmh (35 to 45 mph) there' a perceptible pulsing as if there's a slightly out of round or unbalanced tyre. It's not severe by any means but it's there. It's done it from day one and I just assumed it was the stock tyres and would disappear with new ones. It hasn't. Anyone else notice this? On a fairly rough road you don't notice it; only when the tarmac gets really smooth.