Technical Excessive Inner Front Tyre Wear

[dave]

Re: Tyres shat after 6K

Dave, does that mean that although my overall tyre/rim combo size is roughly the same, that I need to increase my tyre pressures by 4psi. I went from standard 15" with 195/65 to 17" with 215/45.

yep tis a rule of thumb given to be by a bloke thats got very very god rep, ive been doing it for a year now and my tyres are wearing perfectly

 

[bozzy]

Re: Tyres shat after 6K

lowered with what?

Eibach -30mm

 

[minimad99]

Re: Tyres shat after 6K

Dave, does that mean that although my overall tyre/rim combo size is roughly the same, that I need to increase my tyre pressures by 4psi. I went from standard 15" with 195/65 to 17" with 215/45.

checking the manual shows 1.9 bar front and rear for 195/65/r15 rims.......... increasing to 2.3 bar for 215/45/r17
these figures for medium load.

I'm not sure what 0.4 bar equates to in psi

 

[Stilo_ste]

Re: Tyres shat after 6K

Bar is also the SI unit for pressure.

Euro 4 Cummins ISBe common rail pressure is around 1600 Bar

 

[alexGS]

Re: Tyres shat after 6K

checking the manual shows 1.9 bar front and rear for 195/65/r15 rims.......... increasing to 2.3 bar for 215/45/r17
these figures for medium load.

I'm not sure what 0.4 bar equates to in psi

Hi, sorry for the late contribution (haven't been around much lately, busy making a new PC and working to pay for it!)

1 bar is approx. 14.508 psi. I have to admit that I found this a little puzzling due to atmospheric pressure being generally 14.7 psi. But http://en.wikipedia.org/wiki/Atmosphere_(unit) makes it all clear: 1 atm = 14.7 psi = 1.01325 bar.

Therefore,
1.9 bar = 27.57 psi
2.3 bar = 33.37 psi
Difference between these: 5.8psi, 2~3 psi per increase in rim diameter.

I can't think of a good reason why lower-profile tyres, like the 215/45/17s on mine, always have a higher pressure specified (and yet, they do - Dave's advice is good). You would expect that the stiffer sidewalls would keep the tread more 'flat' on the road, so the pressure could be lowered to improve grip and ride quality. However I think the main objective these days is decreased rolling resistance, so the manufacturer quotes the highest pressure that's safe for the tyres, and I guess with the lower profile staying 'flatter', that means a higher pressure is safe.

I had to drive over rocks today (roadworks inexplicably caused the main highway to be made of fist-sized rocks for about 1km near Tirau, if anyone cares ) and I can't see this being very good for my tyres

At the other extreme, I can vouch for the fact that greater or lower pressures (i.e. 45 psi or 25 psi) don't change the adhesion on a smooth racetrack surface - it's really poor either way, compared with 70-profile race tyres

-Alex

 

[wotnowarninglight]

Re: Tyres shat after 6K

Outside has 4mm, inside has sweet FA, bald as a slap head at a slap head convention. Where can I get laser alignment in Brum and anybody any idea around cost?

When I used to live in Quinton/Halesowen used Chemix down the bottom of Mucklows Hill for about 15 years for 4 wheel alignment and have no reservations about recommending them... in terms of price should cost just shy of 30 quid

 

[bozzy]

Re: Tyres shat after 6K

When I used to live in Quinton/Halesowen used Chemix down the bottom of Mucklows Hill for about 15 years for 4 wheel alignment and have no reservations about recommending them... in terms of price should cost just shy of 30 quid

Cheers wotnow, found a place 100 yards from me (set back behind McDonalds) that did it for £17.00 including adjustments. Difference is immediate, no pulling to the left.

Just thought, I usually like pulling to the left

 

[wotnowarninglight]

Re: Tyres shat after 6K

Cheers wotnow, found a place 100 yards from me (set back behind McDonalds) that did it for £17.00 including adjustments. Difference is immediate, no pulling to the left.

Just thought, I usually like pulling to the left

Can't argue with that price Also should find MPG will increase by 3-5 mpg...

 

[ursabear]

Re: Tyres shat after 6K

Kwik Fit on Stafford Park in Telford did mine, computer print out of tracking and caster/camber...bit pricey at £45 but well worth it to find out problem with caster not picked up by dealer.

Not to far away from Brum, about 50 mins up M6/M54 J4, follow signs for Kidderminster off M54. At roundaboutwith obelisk in middle, take 3rd exit, Kwik Fit isabout 1/2 mile on left.

 

[twincamms]

Re: Tyres shat after 6K

I'd say, get used to it, it's a Stilo characteristic, I'm on 32000 miles and on my fourth full set of tyres, just change fronts to rears to ensure you get maximum value from a set as they wear.

I've had mine laser aligned on a £230,000 rig that our local specialist use, people come from miles to have their wheels aligned here, hasn't made much of a difference to mine, they just set them -10 of where the manufacturer recommends to alleviate the problem and it has worked on this last set, 5000 miles and they are still ok, I may even get another 5000 miles from them yet!

 

[Argonought]

Re: Tyres shat after 6K

Kwik Fit on Stafford Park in Telford did mine, computer print out of tracking and caster/camber...bit pricey at £45 but well worth it to find out problem with caster not picked up by dealer.

There's not a lot you can do about it, unless you can persuade your dealer to take it back under warranty, as it's not adjustable (as with most modern cars)

If it's only slightly out then you'll just have to live with it (not that critical to tyre wear anyway).

Need to keep an eye on rear alignment mind you

 

[PNL]

Re: Older car tyre wear

Did you have the cars tracking done on laser alignment ..also there is a service bulletin with fiat about this bulletin number is 44.01.03 if you go to your dealer quote that to them and see what you come up with ..I keep forgetting to ask mine ..

 

[wotnowarninglight]

Re: Older car tyre wear

I find I have tended to need 4 wheel alignment every 4 1/2 - 6 months on my Stilos, NSR always tends to toe in too much but have found that outer edge wear on the rears seems to settle down after 39-40K. Stilo is very sensitive to tracking faults... even a little out and you loose 2-3 mpg - increased fuel consumption is a dead give away, even before wear on the tyres or pulling to the left or the right becomes apparent.

From behind the wheel its difficult to tell, I drove 350 odd miles on a broken NSF spring at speeds of up to 90 mph on the M1 - no pulling and no wheel wobble or dramatic tyre wear, broken spring piece rattling round in bottom spring cup found on checking for source of rattle 3 days later was the only give away.

Recent inner edge wear on the fronts on mine possibly down to Fiat dealer not tracking car after replacing front spings... BUT there are a LOT of POTHOLES out there :bang:

 

[Ralph2]

Re: Older car tyre wear

Being serious for a moment I'll try that bulletin number 44.01.03 thing at my dealer.

I went to this thread because the Abarth had the same problem, inner edge of front tyres down to the chords, outer edges 4-5mm thread. Had the car Laser tracked (front only ) and it was fractionally too much toe IN which seems wrong, I expected too much toe OUT.

Anyway, got bigger problems now, the car's in the dealers having the Selespeed looked at. I'll cover that in another topic soon.

Ralph

 

[PNL]

Re: Tyre wear update

The memo must be about a fiat problem that has not been disclosed i.e for a recall, would cost them too much

You wont get any info off them about any of the service bullitins ..you dont say which one but I'm guessing you mean the one about the suspension and uneven tyre ware 44.01.03 :chin:

 

[dan-the-man]

Re: Tyre wear update

I had that bulletin done to my car Phil, and it seems to have done the trick, although I'm stil having problems with tyres only lasting about 9k miles.

Still trying to find a place that does 4 wheel aligment printouts :chin:

 

[dan-the-man]

Re: Tyre wear update

no they didn't charge me, the car was still under warranty, didn't take them too long though.

Make sure they do a wheel alignment after though as the work causes the alignment to go out.

 

[Juelz]

Re: Tyre wear update

Still trying to find a place that does 4 wheel aligment printouts :chin:

There's a place in Hucknall on Wigwam Lane called M1 4 wheel alignments that does 4 wheel alignments with the printouts.

 

[dan-the-man]

Re: Tyre wear update. result?

they don't change any parts and from what I can remeber they "modify the lower arms" whatever that means

 

[crashbang]

Re: Tyre wear update

RESULT .took it in today bearing in mind well out of warranty.
job entailed wishbone adjustment loosening bushes re torqueing etc.
NO CHARGE AT ALL > Well done Fiat and well done Stonacre Rotherham.

The man at the desk was going to attatch the Fiat service news about this problem and diagrams how to sort it to my file, but I have them.
Now the problem, I am crap with computers but I have a scanner. If someone has the patiece to tell me how to go about scanning and posting them here I will:worship::yum: