40 mph, not age. I recently had two new tyres put on the front, second time I've done this in about a year - first time around was fine. Since the new tyres, I've noticed some quite uncomfortable vibration and judder when reaching exactly 40mph. I took it back to the shop - a very nice guy that checked the new tyres and balance and readded some weights, but still there was no change. Just passing it by the group, for ideas, since my mechanic is on holiday at the moment and it might be a week before I see him. On a side note, had first accident Friday - car rear-ended me and put a whacking great dent in the two parts of the bumper (thin black part now has stress marks, a crack, needs replacing - the red bumper part underneath popped back into shape with only a 5cm diameter mark, nice design, Vauxhall) I was exiting a junction when the man behind me thought I was moving off and slammed in - the first thing he did was get out of the car, apologise and reach out to shake my hand, which I accepted. Was all very gracious and he offered that we either go through the insurance or let him deal with it - he works with motors - so we'll be doing that over the weekend. There's a huge dent inside, where the car-boot-lock bolts onto (bottom of boot when door is opened, but nothing that can't be hammered back into shape. Boot opens now more easily, so I might leave it hehe). Was Friday the 13th, but quite lucky. No-one hurt and I couldn't have been hit by a nicer person.
