The 7 spent 18 days sitting stationary in the shed, waiting for the new electronic ignition system to arrive. When it was parked there was a slight detectable, but virtually unnoticeable movement in the wheel at that 95 to 100Km/h, but certainly no wheel wobble.
When I drove it yesterday for the first time after the spell, the wobble, while not enormous, was enough to have me avoiding that speed, driving under 95Km/H, or above 105 Km/H. This was not unexpected, I know flat spots develop in tyres when sitting loaded in one place for some time.
What was a bit surprising was it was still there after 30 Kilometers. Even more surprising was how much was still there today. It was only after another 50+ kilometers today a total of 90Km that it was down to almost what it was before the spell. This was much more miles than they have taken in the past, even after longer spells stationary.
I checked the production date stamp on the front tyres, & found they were produced in October 2005. I remember accepting them in November 2007 as they were the last decent Pirelli tyres available in Queensland.
So 8 years old, & due for replacement, even if looking as new, with only 20,000 Kilometers on them, they are obviously getting hard, & having trouble recovering from a flat spot.
Not normally a problem in Oz, where we can drive all year, & usually wear our tyres out before they age, this must be a problem for summer only cars, which could develop huge flat spots sitting for months. Particularly in cold climate, these flat spots may never completely recover, giving a permanent unbalance.
Hasbeen
