Ok, just read thru all 20 pages of this
, thanks to Simon for starting it in the first place
, and well done to David C
for persisting with the reminder that we should all be setting our front toe to 0 / parallel which seems to be doing the trick for most (but where did this data come from David C? can we see a printout/scan/evidence?).
Some things to bear in mind are:-
*There is a DEFINATE pattern of both front tyres being worn on the INNER edges, which is essentially caused by the tracking/toe being set/adjusted to toe out too much, and as Simon has reported recently his current set of tyres are still showing signs of wearing more on the inner edges (albeit less than before) after having his toe set to parallel.
*The type,make or size of tyre has no direct bearing upon this problem, its the actual mechanical adjustment of the car that affects the way the tyres wear. The symptoms are only exagerated on the cars with bigger low profile tyres because they have a greater surface area in contact with the road, and in the case of the Ti models the ride height is lower, which results in a more negative camber angle which, as has already been pointed out, cannot be adjusted on the front of these cars
*If you do have your alignment checked/adjusted its more accurate to have the toe measurements done in degrees and minutes rather than mm (as used by some tyre shops). The reason for this is that the value measured will always be the same when in degrees regardless of rim/tyre size, as its an angle, but will need to be ammended to suit rim/tyre size if measured in mm, as its a distance, which is, in turn, affected by rim size.
*I note that Autodata (2009 edition) lists one set of measurements across the whole 159 range, no mention of any difference for the Ti
. Within their data are 2 sets of measurements, a checking range, and a setting range. Just to give the front toe as an example, the checking data gives a value of 0.10'N-0.22'N (to help those that don't know
, thats 10 60ths of a degree toeing out to 22 60ths of a degree toeing out) the setting data (for adjustment purposes) gives values of 0.16N+/_6' which is basically half way between the two checking figures with a tolerance of 6 minutes(60ths) either side (NOT GOOD, when this is what most of the trade refer to as a bible of settings and adjustments for all makes and models of cars since time began). Even if set to the minimum value, the total toe across the front axle will have your wheels pointing in an outward direction of 0.20'N or 1.2mm!
*Most cases of excessive inner-edge tyre wear seem to have only been noticed when the car has been into a workshop/tyreshop when its too late!! The cost of the tyres for the higher spec cars is ridiculous, for the sake of popping to your local tyre shop/motor factor or even dare I say Halfrauds and buying a tread depth guage for a few pounds/euros/dollars (depending on where your reading this) and then using it to check the wear/depths of your tyre treads along with the all important PRESSURES
!!! a lot more use can be made from these expensive yet necessary parts of our cars.
*Finally (for now) I know and realise that most folk don't buy Alfas for their fuel economy, but I understand that there are on going issues regarding poor fuel consumption too, now, do some of the lucky few who have had better tyre life (well aligned cars) also have superior fuel consumption to the rest of the gang??? as a poorly aligned vehicle will have additional drag forced upon it by tyres that don't run true!!!
PS, I measured mine, but in my haste didn't save the measurements
, off memory the rear was pretty good, but the front was just on the outer edge of the allowed toe setting, and the cambers (front) were both more negative than the factory settings. (measured on Hunter equipment).
The car is still under warranty, so I have not adjusted it as there are signs of spanner marks on some of the adjustment points, what or why I don't know as i've only just bought it. I've reported my findings to my dealer along with a few other minor snagging issues since collecting the car 2 weeks ago, and its now booked in for remedial work.
I'll let yo'all know