I have a 2nd gen scion xb with trd lowering springs. In addition, I have 19's with 245/35 in the rear and 235/35 in the front. The rear wheel are 9.5 inches wide. I had the alignment checked by Toyota and I was informed that the rear toe was out of align slightly. The tech informed me that this was normal with trd lowering springs and not to worry. Since then I have had severe cupping on the drivers rear wheel only. Any ideas what could be causing this. I know that the rear does not have any adjustment for alignment. Thanks

 

That's kind of what happens when you can't rotate tires. See if you can get a local tire shop to flip left side to right side, and vice versa. I'm sure the toe is a little worse on the one side.

Also, http://tinyurl.com/5utvk9j

 

Did they check the shocks? Cupping is usually from worn suspension components. It could also be your tires. Some tires wear horribly at the slightest suspension imperfection.

 

I will check the shocks. I had BFGoodrich g-force but I just recently changed to Hankook ventus v12 evo. Thank you all for the quick responses.

 

Its going to do that when you drop your car.. the tow and camber goes off whenyou drop the car.

 

Uhm, there is NO toe adjustment for the rear tires and since this car has a solid axle in the rear lowering it shouldn't effect anything because of the way it pivots.. It already has negative camber from the factory for the rears. the cupping could be due to the fact that there is no weight on the back of these cars and the tires will oscillate more causing cupping. This is why it is important to rotate the tires every 5k and adjust the rear tire pressure lower in the rear. it will soften the bounce.

 

I'm lowered on Eibach Sportlines with the 19's. I have severe tire chopping on the insides of my tires. I disagree on the solid axle pivoting. Because of the way it rotates, the negative chamber becomes negative toe and both fall out of spec. Trust me because I have the numbers and tire wear to prove it. I had the dealership and a tire shop tell me to install a shim kit to bring the alignment into spec which I paid the tire shop to do. Unfortunately, this did not fix my issue. At 5000 miles on brand new Fuzions they told me they had already chopped so bad that I shouldn't rotate them (would feel it in the steering wheel).

 

Rotate them anyways, it will even out the wear. Also again I just lowered mine on DF's and the rear tires were STILL within spec. A shim kit will effect camber. The pivoting will effect caster. Toe has to be out at least 3 degrees to cause that severe of cupping. Was your car in an accident? Did you buy it new? Something's not adding up right. Show me the car FAX!!

 

No accident. My story is spelled out here: https://www.scionlife.com/forums/sho...d.php?t=199874

 

After reading that, I would do the following


Remove the shims and have them check the alignment again. this car was designed from factory with negative camber in the read, even stock you can see the rear tires camber in.

The only "toe" adjustments you could make on these if they removed the swing arm bolt and grind one side and that could give you toe adjustments but you are going to need a real front end and alignment guy to do that.. I wouldn't recommend some tire shop like just tires doing that kind of work.

I have never ran fuzions but the old saying goes, good stuff aint cheap and cheap stuff aint good.. the tires alone could be a problem with poor tread designs..


another contributing factor is the rear springs are very stiff and your factory shocks are valved for a soft spring. it may not be able to keep up with that stiff of a spring.

 

Did anyone ever give camber bolts a shot? http://www.autopartswarehouse.com/de...e&apwidKb8wf4e

I had the same issue with TRD springs, but I was able to keep my tires rotated (didn't have your issue with different sizes front to rear) and that at least helped. Car tracked great though!

 

Those are for the fronts, not rears.. b.t.w. I have those.for.sale. brand new 20 bucks shipped.

 

i am having the same issue with the rear tires on my 08 RS, im lowered on Sportlines with Tokico blues, 18" Yokohama's. I had the front aligned after the drop and have had no issues with the front tires, the shop recommended shims for the rears but i declined after reading various threads on this site. The driver rear seems to be wearing much worse than the passenger rear

 

Kind of an old thread. But my rear toe is also out. I have a 10 rs 7.0 on factory trd springs with the trd 19's on 235's. My rear toe is .12 left and .36 right and the right side is worn on the inner tire. Was also thinking about the shims, but after reading all this guess all I can do is rotate and pray...And I have nitto nt555's

 

I installed Eibach Prokit springs and alignment indicated both rear toe and camber were marginal. I installed front camber bolts and adjusted them to neutral, though actually, the front camber was still within spec (though less so than OE). Still, I'm not yet noticing any tire wear issues (approaching 11Kmi on a 200.

PS. I'm running the OE struts.

 

@TrevorS is your rear toe also around .30 something? I never noticed the wear on my tires until recently but it's time for new tires anyway. 20K was about it on the Nittos. Just thinking that maybe my tires being worn also contributed to the wear on the passenger rear being slightly out.

 

I have the same issue but figured it's because I have factory shocks with the df210's. Has anyone found a good shock to use for a lowered xb2? Not so much brand but a shock that will fit that's shorter to accomadate for the drop.

 

To my knowledge, Tokico is the only aftermarket replacement other than the TRD units.

Not the shock, it's alignment and lack of rotation.

 

My alignment is within spec, just a little off on the toe in the rears which is to be expected. Cupping usually comes from the tire bouncing down the road so to speak of as my understanding. Which would indicate a balance issue or suspension. What I was looking to get was a shorter shock so I may just have to take some measurements and order them by size and not by a make/model.

For ex: 1st gen owner can get Sienna shocks for the rears which are shorter and work better with the lowered suspension.

 

Sienna shocks work for the xB2, too... just need spacers that Randode may still make. Or just use washers.