russellhayward Posted June 12, 2014 Report Share Posted June 12, 2014 Would be grateful for some help with this. Also have a problem with an E90, (see my other post). They are related as set-up done at same tyre dealer and also tyres are Contisport. The car : 118d msport 2007 The tyres : Conitsport 3 fitted at 34k miles. Rears were worn out after 20k miles with even wear and replaced with Assim 2. So issue is with front only. Mileage now : 57k miles Alignment done as below @ 41k miles. Car was weighted Tread across rest of tyre (inner to outer) 3/4/5mm Shoulders wearing as per pic, not horrendous, but it won't be too long before they are slick. Many thanks in advance . . . Quote Link to comment Share on other sites More sharing options...
Tony Posted June 12, 2014 Report Share Posted June 12, 2014 Hello... I wish places would measure the castor angle. Ok it's not adjustable but it has many important duties so it would help to know it's position...... Anyway is the OSF outer shoulder doing the same thing? Quote Link to comment Share on other sites More sharing options...
russellhayward Posted June 12, 2014 Author Report Share Posted June 12, 2014 Yes both tyres wearing exactly the same. I did wonder if the design of the Conti 3 contributes, as the outer edge does seem to have less tread and "slope" away towards the outside of the tyre My other post on the E90 (coming shortly) may or may not support this Quote Link to comment Share on other sites More sharing options...
Tony Posted June 12, 2014 Report Share Posted June 12, 2014 The tyre design makes things look worse but there is wear...... It's a hard call in this case because the wear looks camber related but you say they did correctly ballast the car..... Problem is the front camber is adjustable but it's a bugger of a job and expensive so there's a measure of reward. Good news is the wear is very confined and you are allowed to lose 1/8th of tread on each shoulder. Quote Link to comment Share on other sites More sharing options...
russellhayward Posted June 12, 2014 Author Report Share Posted June 12, 2014 Well I'd rather pay for the adjustment than trash two perfectly good tyres which should give 40k assuming correct wear. Given the inner edge is also more worn than the rest of the tyre, would any camber change to correct the outer wear make the inside edge wear worse ? Would also appreciate some tyre recommendations which may improve matters. Car just tootles around mainly, so performance isn't really an issue. Longevity more important. Having put Goodyear Assim 2 on the E90( see other thread) I am shocked to see how quick these have worn on the rear of that car, down to 5mm after 5k miles. Quote Link to comment Share on other sites More sharing options...
russellhayward Posted June 12, 2014 Author Report Share Posted June 12, 2014 Car is run at stock pressures, and regularly checked with a very decent gauge. Quote Link to comment Share on other sites More sharing options...
Tony Posted June 13, 2014 Report Share Posted June 13, 2014 Sorry i must have missed that.... So the tyres are wearing on both edges? Quote Link to comment Share on other sites More sharing options...
russellhayward Posted June 13, 2014 Author Report Share Posted June 13, 2014 Only slightly "Tread across rest of tyre (inner to outer) 3/4/5mm" Quote Link to comment Share on other sites More sharing options...
Tony Posted June 13, 2014 Report Share Posted June 13, 2014 So the gradient is from the inside out plus the very outer shoulder wear..... A change in camber is not going to help here because it's a lose lose situation.... The inner gradient of 3/4 covers a wide area suggesting a dynamic toe issue. Quote Link to comment Share on other sites More sharing options...
russellhayward Posted June 13, 2014 Author Report Share Posted June 13, 2014 Yes, but the inside to out wear is very very slight in reality Quote Link to comment Share on other sites More sharing options...
Tony Posted June 14, 2014 Report Share Posted June 14, 2014 Well i feel a change is tyre pressure is required +2psi would help. Quote Link to comment Share on other sites More sharing options...
russellhayward Posted June 16, 2014 Author Report Share Posted June 16, 2014 What I forgot to mention is the recommended load rating for the front is 89. These Contis are extra load tyres with 93 load rating. Is this likely to make a difference ? Quote Link to comment Share on other sites More sharing options...
Tony Posted June 17, 2014 Report Share Posted June 17, 2014 No..... The side wall might have an extra ply but not generate additional wear. If anything the 93 can generate tram-lining due to it's stiffness, also known as slip angle coefficient saturation. Quote Link to comment Share on other sites More sharing options...
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