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* also posted in the GS suspension section but since the suspensions are similar I thought I'd ask here as well.
Looking for some suggestions as to the cause of the excessive inner tire wear I am seeing on my last 2 sets of rear tires. First set lasted 4K miles, second set lasted maybe 8k miles at the most.
I have a 2014 GS350 AWD lowered with the J5 coilovers and the figs rear camber arm. Alignment was checked and adjusted to factory specs before the latest set of Michelin super sports went on. The shop mentioned the toe was way off causing the first set to wear prematurely. Now I'm starting to wonder if there's something not tightened down that is allowing the alignment to change over time?
what exactly were your alignment specs? It is a definitely a toe wear.
3IS Rwd has same wear issue on the fronts due to the soft lower control arm but no so much on the rear.
I think the combination of excessive camber and toe caused your problem. Unless you have a possibly loose toe arm?
If i remember correctly my factory rear toe was way off too as well (no modifications whats so ever). But the tires held up just fine, 18k and probably had another 10k more to go.
Do you remember what your camber settings were for the rear after installing the adjustable camber arm? 4-8k seems very extreme unless alignment was really off.
also it seems like from the pictures, the tire blew out due to low air. The toe wear probably caused the air to leak.
It's odd that you'd get that kind wear on the inside of tire for the rear. The lower the car goes in the rear the more toe-in it produces. It should scrub moreso the outside of the tire depending on camber specs
Could it be lower tire pressure played a role? Do you have TPMS to keep track?
Did you have shop inspect to make sure nothing was loose at any of the suspension adjustment points? Better than speculating and just check on your actually car
a interesting semi related video that I thought i'd share of how much Toe angle movement happens on factory suspension arms when the vehicle is lowered through its suspension travel.
I posted the video to show Toe movement through suspension travel.
Ignore the excessive camber, It is personal preference and done for styling of course
Mechanic at the dealership thinks the alignment was off (toe) in front and back but while he was inspecting the vehicle he noticed the differential seal was leaning so he is going to check the alignment after that repair rather than now.
I am having the EXACT same issue. Came here researching if adjustable camber arms would help. I am currently lowered on RSR super downs with 20" Vossen CV5's and I'm getting about 8k on my rear tires. My current set will be my 2nd as well. I also had my last alignment done at the dealership. Interested to see what the resolution is, these tires are burning a hole in my wallet.
Even if your toe is set to 0 or close to it, you could experience dynamic toe change. That is toe change under load/while driving. So at rest you could have 0 toe but while taking a turn or under light accelerating/braking, you could have excessive toe change. Dynamic toe change can occur when bushings are busted and weak. If your car is high mileage or lowered without removing preload to bushings, you could have dynamic alignment changes.
I'd inspect the front control arm bushings first.--assuming your alignment toe is zeroed out (or close to it)
Mechanic at the dealership thinks the alignment was off (toe) in front and back but while he was inspecting the vehicle he noticed the differential seal was leaning so he is going to check the alignment after that repair rather than now.
I will keep you all posted
Did you check the rear alignment after this issue? if the toe setting are changing after few thousand miles, then it has to be a bushing or loosen bolt. It seems like other IS owners with lowering springs have same issue on the rear.
just got an alignment this morning and noticed my passenger rear has the same issue...same tires too.
As for the alignment spec sheet, please keep in mind that I was preciously lowered on Swift Springs and went to BC Racing coilovers last month. I waited about a month for the alignemnt (un-intentional) and my tire is shot.
mjh09e, I got about 15k miles with the same set up with Swifts springs and 19"s F sport forged before noticing the same tire wearing horribly on the inner. My car often totes 4 people and lately I'm pretty sure my rear stock shocks are toast! I'm also going with BC coilovers and would like your input on adjustability and ride quality?
I bought a pair of these in hope to adjust the rear camber to hopefully even out tire wear.
07-31-17, 05:28 PM
Excessive Tire Wear
