Date: Sun, 07 May 2000 23:28:19 -0700 From: Johannes H Andersen <johannes.andersennopsamel.ac.uk> Subject: Re: 9-5 - Abnormal Tyre wear???
Simon Watkins wrote: > > Johannes H Andersen <johsnopsamsafish.com> wrote in message > news:39157E3D.5CAA5EFDnopsamsafish.com... > > > I don't know about the 9-5. In general it is possible to wear the tyres > outside > > edge quickly by hard cornering, but you said that you drive gently ? How > gently > > do you drive ? > > I'm sensible - I don't throw the car around or anything. Family man, etc > etc. > > The tracking may be out, but I expect that any Saab main dealer > > should have proper tracking equipment. A tracking fault is usually felt in > the > > steering. > > Nothing perceptible > > The car should feel directionally stable and not have any tendency to > > veer off course. > > It only veers with the road camber. ie flat road, no veering. > > >Is the excessive wear symmetric between both front tyres ? > > Almost. The nearside tire has more wear on the edge than the offside. > > > The question is difficult because tyres can last from 10000 to 50000 miles > > dependent on driving. > > > > Johannes > > Hmmm - would having an Auto gearbox cause more wear as the dealer suggested? > And that wouldn't account for the uneven wear... I can't believe that there > isn't something wrong. I've had the car from new, and the only time it has > been driven at high speeds was on German autobahns. I don't throw it around > bends etc, so I don't know whether I am being unrealistic in expecting these > expensive tyres to last longer than 11500 miles through uneven wear. The > remainder of the tyre is only about 1/3 worn. In other words, I could have > expected up to around 25-30k out of the fronts had it not been for the > scuffing on the edges. > Can't think that the auto box should cause more wear. You said that tyres was worn "almost" on the limit. My mechanic says that the limit 1.6mm need only be satisfied for 75% of the tyre area ? So there could still be some life left in the tyres. Anyway, asymmetric wear would not be not right, but then I understand that the wear is "almost" symmetric. In hindsight, you would have a stronger case if you had diagnosed the problem earlier on. But this is easy to say now. I would try an alternative garage for tracking without mentioning the problem. If there is a real problem, then it can only be due to geometry. Johannes > Simon
 |
 |
 |
 |
 |
